Need some program ideas / homework

Question

Hello, i am a starter at c sharp, and I am kinda stuck at the point where i'm at.

I've followed a couple of youtube c sharp series, but I don't know where to learn next.

I'm still in middle school, and i'm planning to study computer science when I graduate.

I just want a head start for when the time comes :)

So my question is, do you have any ideas / tips / homework for a beginning programmer?

Like; make a calculator.

Thanks a bunch!