בסוף היום אמרנו שטוב שעבדנו קשה, כי גם החדר נראה טוב יותר וגם הגינה הייתה מוכנה לזרוע בה.

בסוף היום literally means at the end of the day.

• ב־ = in / at
• סוף = end
• היום = the day

In natural English, at the end of the day is the best translation here.

Hebrew often uses ב־ in places where English uses at. So even though ב usually means in, בסוף היום is completely normal Hebrew for at the end of the day.

Because Hebrew usually does not need a separate subject pronoun when the verb already shows who is doing the action.

אמרנו means we said:

• אמר = said
• ־נו = we

So אמרנו already includes we.
You could say אנחנו אמרנו, but that would usually add emphasis, like we said (as opposed to someone else).

The ש here means that.

So:

• אמרנו שטוב... = we said that it was good...

In writing and speech, ש is often attached directly to the next word:

• ש + טוב = שטוב
• ש + עבדנו = שעבדנו

This is very common in Hebrew.

Because they introduce two different clauses.

• אמרנו שטוב... = we said that it was good...
• טוב שעבדנו קשה = it’s good that we worked hard

So the structure is:

• אמרנו = we said
• שטוב = that it was good
• שעבדנו קשה = that we worked hard

English can do something similar:
We said that it was good that we worked hard.

So the two ש words are not redundant; each one connects a different part of the sentence.

Because טוב here is being used in an impersonal expression: it is good that...

Hebrew often says:

• טוב ש... = it’s good that...
• חבל ש... = it’s a shame that...
• ברור ש... = it’s clear that...

There is no separate word for the English dummy subject it here. Hebrew simply says good that...

So טוב שעבדנו קשה means it’s good that we worked hard.

Yes, קשה is basically an adjective meaning hard / difficult, but in Hebrew it is also commonly used in a way that corresponds to the English adverb hard.

So:

• עבדנו קשה = we worked hard

This is very natural Hebrew.

A native English speaker may expect a special adverb form, but Hebrew usually does not create adverbs the way English does with -ly. Very often, an adjective form is used where English would use an adverb.

כי means because here.

So the sentence moves like this:

• אמרנו שטוב שעבדנו קשה = we said it was good that we worked hard
• כי... = because...

Then the sentence gives the reasons:

• the room looked better
• the garden was ready for sowing

So כי introduces the explanation.

גם ... וגם ... means both ... and ...

Here:

• גם החדר נראה טוב יותר
• וגם הגינה הייתה מוכנה לזרוע בה

Together, that means:

• both the room looked better and the garden was ready to sow in

This is a very common Hebrew structure.

A few useful patterns:

• גם אני = me too / I also
• גם X וגם Y = both X and Y

The second גם is often attached to ו as וגם, meaning and also.

In this sentence, נראה means looked / appeared.

So:

• החדר נראה טוב יותר = the room looked better

The verb להיראות means to look / to appear / to seem.

Although it can sometimes resemble was seen if translated too literally, here it is definitely about appearance:

• החדר נראה טוב יותר = the room looked better
• not the room was seen better

Also:

• טוב יותר = better
• literally: more good

That is the normal Hebrew way to form better in many contexts.

Hebrew often forms comparisons with יותר, which means more.

So:

• טוב = good
• יותר = more
• טוב יותר = better

This is very common:

• גדול יותר = bigger
• מהיר יותר = faster
• קל יותר = easier

So טוב יותר is the standard way to say better.

Because הגינה is a feminine singular noun.

That means both the past form of to be and the adjective must agree with it:

• הגינה = the garden (feminine)
• הייתה = was (feminine singular)
• מוכנה = ready (feminine singular)

If the noun were masculine, like הגן, then you would say:

• הגן היה מוכן

So this is a standard case of gender agreement in Hebrew.

לזרוע בה means to sow in it or to plant seeds in it.

Breakdown:

• לזרוע = to sow
• בה = in it (feminine)

The pronoun בה refers back to הגינה.

So:

• הגינה הייתה מוכנה לזרוע בה = the garden was ready to sow in

A native English speaker might expect something more like ready to sow it, but that would not be correct, because you do not sow the garden; you sow in the garden.

That is why Hebrew uses the preposition ב־:

• לזרוע בגינה = to sow in the garden
• לזרוע בה = to sow in it

The pronoun often comes after the verb phrase, so placing בה at the end is normal.

It could, but בה is smoother because the noun has already been mentioned.

Compare:

• הגינה הייתה מוכנה לזרוע בגינה
  = the garden was ready to sow in the garden
  This is grammatical, but repetitive.

• הגינה הייתה מוכנה לזרוע בה
  = the garden was ready to sow in it
  This sounds more natural.

Hebrew, like English, often replaces a repeated noun with a pronoun when the reference is clear.

The given word order is natural, but Hebrew word order is somewhat flexible.

This sentence is organized in a very logical way:

1. בסוף היום = time frame
2. אמרנו = main action
3. שטוב שעבדנו קשה = what we said
4. כי... = reason
5. גם... וגם... = the two results

So the sentence flows clearly from when, to what we said, to why.

Some parts could be moved in other contexts for emphasis, but the version you have is a very standard and natural way to say it.