these sites will teach you a lot, spend a few hours read and watching videos do it in a weeks time as you work on stuff, Best thing to do is build something simple like a clone of a very old game to learn Playmaker. Make a 3D pong or something.
http://www.hutonggames.com/tutorials_game_design_with_playmaker.phphttps://hutonggames.fogbugz.com/default.asp?W1I took some time to learn Playmaker by building a 2D Arcade Style Fighting Game, I didn't finish it but all the basics are there, I do plan on finishing it.
Not even the guys who works for AAA company's or Seasoned Indies can just jump into making a game with a new program,even if it's a program like Unreal the changes from Unreal 3 to 4 were Big enough were some(If not Most) People had to take time to learn the new stuff.