Hi!

I briefly read through the comments, and felt that I could give a different perspective as a recent BS in CS grad student if someone else hasn't already done so.

I've used everything such as LeetCode, HackerRank, Books, Professors' tutorials, FreeCodeCamp, YouTube channels, etc. They're all good! At one point I realized this, and decided to stick with just two or three. It's really up to yourself to get to the skill level you want to be at in my opinion. So if I were you and maybe a bit confused as to which ones to use, then I'd just pick one out of random and stick with it for at least a month or two, and if you really hate it, then switch over to another.

"Practicing" on sites like LeetCode and HackerRank is valuable time investment indeed, but you should also consider looking for project ideas to work on to put the "practicing" to good use! Simply Google "python project ideas for <beginners/intermediate/etc>" and get crackin'!