I have always been impressed that pilots can control aircraft's by operating the directional flight controls.
I don't really know much about flying planes. What type of schooling or training is required to be a pilot?
I am not sure, but I think it is 500 hours of flying so they can be safe.
How long does it take  in classroom time to get a basic license? Are there different levels?
Again I am not sure, I do know that you can do a pay to work program so you can operate an aircraft by paying for it.
Who oversees pilots, Is there an aagency?
US Airline Pilots Association
The US Airline Pilots Association (USAPA) was the collective bargaining agent for the majority former US Airways "East" pilots, and the minority former America West Airlines "West" regional pilots. USAPA was led by East pilot Mike Cleary. USAPA was formed by East pilots for the exclusive and purpose of attempting to overturn the results of the previous pilot seniority integration arbitration. During the fair representation trial, USAPA used as courtroom witnesses East pilots Sully Sullenberger and Jeffrey Skiles of the infamous Hudson River flight
, "It never really was me." In 2006, Earnhardt told Dan Wetzel of Yahoo! Sports: "We live in a country where you can speak freely and do as you may. I don't know (if) what that flag stands for is the same for me as it is the guy who might have it flying out there. I am not going to agree with everything everybody does all my life. So I don't have any control over it." Following the Charleston church shooting in 2015