Having a real-life pilot is always good - I suggest to send a PM to D-ECHO here on the forum - he's maintaining several gliders, maybe also one you flew IRL and I guess he would be glad to have a real-life glider pilot !
Apart from that, even if you're not a programmer, there's still a number of ways to contribute to FG - for example by taking photos of trees and buildings, adding scenery models, making liveries, … and in addition, becoming an actual programmer isn't that hard either !