Keramikkurset begynner klokken seks.

Because Norwegian usually writes compound nouns as a single word.
So keramikkurs = ceramics course / pottery course, not two separate words.

Then -et is added to make it definite, giving keramikkurset = the pottery course.

-et is the definite article attached to a neuter noun. In Norwegian, the definite article often goes at the end of the noun instead of being a separate word.

So:

• et keramikkurs = a pottery course
• keramikkurset = the pottery course

This is very common in Norwegian.

In Norwegian compounds, the more specific word usually comes first and the main noun comes last.

So:

• keramikk tells you what kind of course it is
• kurs is the main noun

That means keramikkurs literally works like ceramics-course.

English often uses separate words for this, but Norwegian prefers one compound word.

Begynne is the infinitive, meaning to begin.
Begynner is the present tense, meaning begins / is beginning.

So:

• å begynne = to begin
• begynner = begins

In the sentence, the course is doing the action now in a general present-time sense, so Norwegian uses the present tense: Keramikkurset begynner ...

It can cover both, depending on context. Norwegian present tense is often broader than English.

So begynner can correspond to:

• begins
• is beginning
• sometimes even starts

In this sentence, the natural English meaning is begins at six o’clock or starts at six.

Yes, often you could. Starter and begynner can both mean starts/begins.

For this sentence:

• Keramikkurset begynner klokken seks.
• Keramikkurset starter klokken seks.

Both are natural.

A small difference is that begynner may sound slightly more like begins, while starter may sound slightly more like starts, but in everyday use they often overlap.

Klokken seks means at six o’clock.

Here, klokken literally means the clock, but in time expressions it functions like o’clock.

So:

• klokken seks = at six o’clock
• klokken to = at two o’clock

This is a standard and very common way to tell time in Norwegian.

Because Norwegian often does not need a preposition here. English says at six o’clock, but Norwegian can simply say klokken seks.

So the time expression itself works adverbially:

• Keramikkurset begynner klokken seks.

You do not need an extra på or i here.

Sometimes yes, especially in casual speech when the meaning is obvious. But klokken seks is clearer and more standard when giving a starting time.

So both may occur, but:

• begynner seks can sound more informal or context-dependent
• begynner klokken seks is clearer and safer for learners

This is the normal Norwegian main-clause word order:

subject + verb + time expression

So:

• Keramikkurset = subject
• begynner = verb
• klokken seks = time expression

This is very similar to standard English word order: The pottery course begins at six o’clock.

Yes. That is also correct.

Norwegian follows the V2 rule in main clauses, which means the finite verb must stay in the second position. If you move the time expression to the front, the verb still comes second:

• Keramikkurset begynner klokken seks.
• Klokken seks begynner keramikkurset.

Both are grammatical, but the second version gives a bit more emphasis to the time.

Because Norwegian usually marks definiteness by attaching the definite article to the end of the noun.

So instead of a separate the, Norwegian often uses endings like:

• -en
• -a
• -et

Here:

• et keramikkurs = a pottery course
• keramikkurset = the pottery course

So the idea of the is already built into the word.

Yes. The basic noun here is kurs, and kurs is a neuter noun in Norwegian.

That is why you get:

• et kurs = a course
• kurset = the course

Since keramikkurs has kurs as its main part, the whole compound is also neuter:

• et keramikkurs
• keramikkurset

Grammatically, it means at six o’clock. In real life, whether that is exact or approximate depends on context, just as in English.

If someone says:

• Kurset begynner klokken seks

the normal understanding is that the official starting time is six.

If they wanted to be less exact, they might use other expressions, but this sentence itself presents six as the set time.