Sure. I don’t recommend books or courses because they go deep into theory whereas this is a different endeavor.

I recommend coming up with templates for the finite amount of problems.

Recursive Graph/Tree Linked List Array

The array problems can be the most unique, which means a template isn’t always possible.

Practice timing yourself. This is harder than it looks.

Stop problems that take you too long or they’ll wear you out. Come back and solve them again.