I am new to the sport and I HIGHLY suggest going out and playing first. There is a new indoor field called Ultimate Airsoft they offer rentals. For the day you will pay around $60 and will acquire a TON of information.
I have made mistakes and paid WAY too much for medium quality guns. Put your wallet away for now and come into the sport with wide eyes and open ears. Everyone I have met is EXTREMELY helpful! They all have learned their fair share about airsoft and are always happy to share their findings.
GET OUT AND PLAY
It is really fun and even better when you get your fellow paintballer friends into it to!
Hope to see you out there sometime!!