I maybe would have invested a little more money into a better gun.....
Then again, good job with the avenger. It's a good newb gun. I'm not insulting you, but I am saying that you have a cheap gun to play with for now to decide how much you like paintball and whether or not you want to keep playing. You may find your gun outclassed and decide to upgrade later on, which is ok. You definitley don't want to discontinue playing and realize that you waised 300+ on something you've used twice and won't get 200 back out of.
Honestly tho, Enjoy the sport, pick up a good squeegee and mask. Also, find a flame retardant suit because cocky pros are going to give you hell. But make sure you rub it in when your 75$ walmart special took out an autococker usin pro.
You may get owned due to your lack of experience, but your gun won't contribute that much, as long as you can fire purty quick and atleast hit something at medium *brain fart on medium, dunno if spelled right* distance, then you should be a ok.