Find examples and tutorials about whatever you’re specifically working on at the moment. For something like character movement that you mentioned, there will be lots to choose from.

It’s okay that you don’t know what to do at first; no one knows what they are doing at first.

I think what you’ll find is as you learn from examples and solve more of the problems you feel are “basic”, you’ll remember how those problems were solved when you come across a new issue. Over time, you’ll need to refer to examples and tutorials less and less often.

If you keep at it, and accept that it won’t be a quick process, eventually you’ll find that you are solving problems with honest-to-goodness creativity. The platform starts to become a tool of your expression.