In short though: Book to rent your kit, show up and play. People tend to understand how hard it is to get new players into airsoft so they're pretty approachable. The ones that aren't I'd just avoid.
Hi. Yeah you got it. Just turn up, most are a pretty friendly bunch - you'll soon find someone who'll help you out. Don't be afraid to ask questions Better to go with a mate but if your name's Billy then no problem.... Enjoy
Also, a lot of the time, unless you're adding a lot of layers on top, it hurts pretty much just as much and for just as long with a shirt or trousers on may as well look macho whilst getting shot with plastic!