Als we eraan denken om elke dag een beetje te doen, wordt Nederlands vanzelf minder moeilijk.

Als means if or when in this kind of sentence.

Here it introduces a condition:

• Als we eraan denken ... = If we remember / If we think about it ...

Because the als-clause comes first, the main clause that follows has inversion:

• ..., wordt Nederlands vanzelf minder moeilijk.

That is why wordt comes before Nederlands.

The verb is denken aan = to think about.

When the object is not a person but a thing, idea, or action, Dutch often uses a prepositional adverb:

• aan + het → eraan
• op + het → erop
• met + dat → daarmee, etc.

So:

• denken aan iets = to think about something
• eraan denken = to think about it / to remember it

In this sentence, eraan refers forward to the action:

• om elke dag een beetje te doen

So the structure is roughly:

• eraan denken om ... te ... = to think of / remember to ...

Eraan points to the idea that comes after it:

• om elke dag een beetje te doen

So the meaning is something like:

• If we remember to do a little every day ...

Even though the action is stated after eraan, Dutch still uses eraan because of the fixed expression eraan denken om te ...

Dutch often uses om ... te + infinitive to express in order to, to, or a planned/intended action after certain verbs.

Here:

• eraan denken om ... te doen

means:

• to remember / think of doing ...

So:

• om elke dag een beetje te doen = to do a little every day

This is a very common structure:

• Ik probeer om vroeger te slapen.
• We vergeten om hem te bellen.

In modern Dutch, om is sometimes optional in some constructions, but after expressions like this it sounds very natural.

In Dutch, infinitives often go near the end of the clause, especially in te-infinitive constructions.

So:

• om elke dag een beetje te doen

literally follows the Dutch pattern of putting the action word last.

Compare:

• Ik probeer Nederlands te leren.
• Ze belooft morgen te komen.

This is normal Dutch word order.

Een beetje means a little or a bit.

Here it means a small amount of work/study/practice each day.

So:

• elke dag een beetje doen = do a little every day

It does not have to refer to a physical thing. It can refer to effort, practice, studying, reading, etc.

Doen is being used in a broad, general way: to do, to put in some effort, to do some practice/work.

Dutch often uses doen where English might also use a more specific verb depending on context. Here it keeps the sentence general:

• study a little
• practice a little
• work on it a little

All of that can be covered by een beetje doen.

This is because Dutch is a V2 language: in a main clause, the finite verb usually comes in the second position.

The first position here is taken by the whole subordinate clause:

• Als we eraan denken om elke dag een beetje te doen

So in the main clause, the finite verb must come next:

• wordt

Then comes the subject:

• Nederlands

So:

• ..., wordt Nederlands vanzelf minder moeilijk.

This inversion is very common after a clause or adverb at the beginning:

• Morgen ga ik naar school.
• Als het regent, blijf ik thuis.

Worden means to become.

So:

• wordt minder moeilijk = becomes less difficult

That is a bit different from is minder moeilijk:

• is minder moeilijk = is less difficult
• wordt minder moeilijk = gets/becomes less difficult

Here the sentence emphasizes change over time.

Vanzelf means something like:

• by itself
• naturally
• automatically

In this sentence, it suggests that if you do a little every day, Dutch will naturally start to feel less difficult.

It does not mean literally that no effort is needed. It means the improvement will come in a natural way as a result of the habit.

Both are possible, but they are slightly different in feel:

• minder moeilijk = less difficult
• gemakkelijker = easier

They are often very close in meaning. Here minder moeilijk keeps the wording tied to the idea of difficulty. It may sound a little more measured or gradual.

So:

• Nederlands wordt vanzelf minder moeilijk
• Nederlands wordt vanzelf gemakkelijker

Both are natural, though the first matches the original sentence better.

Here Nederlands is a noun, meaning the Dutch language.

Dutch capitalizes language names, so:

• Nederlands = Dutch (the language)

Examples:

• Ik leer Nederlands.
• Nederlands is moeilijk.

As an adjective, Dutch usually uses forms like:

• de Nederlandse taal
• een Nederlandse docent

It is best to think of the full pattern here as a common expression:

• eraan denken om iets te doen

This means:

• to remember to do something
• to think of doing something

Examples:

• Denk eraan om de deur te sluiten.
• Ik dacht eraan om hem te bellen.

So yes, this is a very useful pattern to learn as a chunk.

No, that would not sound right.

After denken aan, if you want to refer to an action, Dutch normally uses a structure like:

• eraan denken om ... te ...

So the natural sentence is:

• Als we eraan denken om elke dag een beetje te doen ...

Without er and om ... te doen, the sentence would be ungrammatical or at least very unnatural.

The sentence can be divided like this:

1. Subordinate clause

   • Als we eraan denken om elke dag een beetje te doen
   • If we remember to do a little every day

2. Main clause

   • wordt Nederlands vanzelf minder moeilijk
   • Dutch naturally becomes less difficult

A useful grammar pattern to remember is:

• Als + clause, verb + subject + rest

So this sentence is a good example of both:

• subordinate-clause word order
• main-clause inversion after an opening clause

In Dutch subordinate clauses introduced by words like als, dat, omdat, terwijl, the finite verb usually goes toward the end.

So:

• Als we eraan denken ...

has normal subordinate-clause word order.

Compare:

• Ik weet dat hij morgen komt.
• Als we tijd hebben, gaan we wandelen.

In your sentence, the subordinate clause also contains an infinitive phrase, so the verbal material gathers near the end:

• Als we eraan denken om elke dag een beetje te doen

That is a very typical Dutch pattern.