Finally quit my job, what do I need to ask/do ?

I'll have my final day on the 31st of October and I'll start a new one on the 17th of November

I was wondering if I needed to ask anything from my current employer before leaving,
I know I'll need to go to the immigration to update everything, I've planned too

I'm also wondering if I can ask for unemployment for only 2 weeks ?

And Ive read that hello work was the place to go to report my previous company for non paid overtime work, what should I bring as proof besides the time card and pay check ?

Thanks for the help !