A few questions from a rookie

[jgully]

Hey, I'm pretty new to the officiating world. I just started a few weeks ago and have refereed a few middle school games. I have a few questions.

Recently I made a call where a player jumped up for a shot but then came back down with the ball when a player blocked the shot. What is the ruling about this?

Also, if a player is shooting two free throws and does not hit rim on the first of two, does he still get to shoot the next shot? Is any type of penalty assessed?

Sorry if these are easy or stupid... please help.