Could you please refer me to a comprehensive article about usage of 'when' statements?

I’m surprised by how it is hard to find something on the web, that would comprehensively describe every case of using ‘when’ statements. For instance, I’ve found that I can use statements like this:

• when (present simple), (present simple)
• when (past simple), (past simple)

I understand that I can say something like this:

I meet you when you arrive at the station.

But I’m also aware of continuous statements with ‘when’, but haven’t found anything on it. For example:

When I’m doing homework, I always feel tired – is it correct? Or should I say "I’m always feeling tired" instead?

P. S.

I’d be the most grateful, if you provided me how ‘when’ statements are called. Cause I know that ‘if’ statements are called ‘conditional’.