Pointers for making the team and what websites are good to learn more about it.

I used to really hate basketball and never played it, but now all of a sudden I like to play it alot, but I can only make layups.
I have been practicing so hard but no matter what I do I can only make like 1 in 7 shots, for 2 pointers and 1 in 10 for 3 pointers.

I amm not seeing any improvement from all this practicing any tips?