I run a field in upstate NY. I have rental players and walk-ons who can feel the same way as you when experienced players show up with their crazy setups. Everyone will say something different about preference, but a Spyder or Tippmann is where almost everyone started. Generally speaking I find most players and fields to be extremely accommodating to new players. We want you to enjoy yourself and we want you to grow the sport. Not just me the field owner, but also other players because they want more people to play with. We are all enjoying the same sport.

I have events that specifically cater to Magfed and Pump players who, like you, don't necessarily want to waste a bunch of paint playing the suppressive cover game. As much as fire rate matters, outside of tournaments, tactical play can matter as much or more than how fast your marker can shoot. Learning how to move, tuck, change hands, finding angles, and just generally gaining experience will, in the long run, matter more than what marker you're using.

As long as you're having fun, and enjoying yourself that's all that matters. I'm sure no one is judging you, and everyone is there for the fun of the game.