Drill: Michigan Intensity Layups (I can't recall who gave me this, apologies)
We cannot practice finishing enough.
Concepts:
1) Learn a new language, Basketball." Teams have unique nomenclature but players must acquire 'standard terms'. Learn to separate with the ball and without via cutting or screens.
This review from HoopStudent.com covers over twenty-five types of screens.
2) A "Ram Screen" employs a player getting a screen into setting a screen.
3) An "Elbow Get" brings the opposite post across to screen for his counterpart at the elbow.
Play: Many NBA teams run an early offense "Pistol action" which simplified is a dribble handoff with a trailing screen or can be a pick and roll. Here's a helpful article with video. Some teams run it with only two players ball side and look for more action off the helpside.
Lagniappe: We're both here for the same reason, to learn. There's only one rocket scientist in my family (my wife).
You wouldn't know it from the ECF, but the Celtics sometimes run actions including pistol. They often run it with two players ballside.