Dump the bench press - its not going to kill you. Stay AWAY from weird barbell variations of any lift UNTIL you have mastered the "real thing" i.e. the squat, press and deadlift.
I also encourage you to learn how to jump/bound, situp, dip, chin/pull up, leg raise, ab wheel, and RUN.
If you do this, you will get stronger and be better PHYSICALLY. I work with kids everyday and while the kids themselves are fucking great, I am baffled how few are even remotely physically fit/strong. And these are ATHLETES, not "regular people". You got the shit-end of the stick in terms of developing a GPP base so make sure you get this done.