What do you wanna understand? Shooting from beyond Painted arc is a 3, shooting inside the arc is 2 points. If fouled(usually hitting the wrist or arm of ball handler) a certain number of times or fouled while shooting will result in a Free Throw opportunity, some leagues do this differently where its a 1 and 1, where you shoot 1 free throw and of you miss the game resumes, if you make it, you get another one. NBA gives you two makes.

Not allowed to walk with the ball more than 2 steps without dribbling ( you can technically do 3 steps because the gather isnt counted). Can not stop dribbling then resume dribbling without passing it to a teammate first (called double dribble).

Anything else youre curious about?