Hi mate, welcome to the forum. I'm also an ayrshire man, originally from troon , now in paisley.
Im a member of dundonald rifle and pistol club, which in my opinion is the best club in the area. It's also an fac club and requires a 3 month probationary period which is great fun. We have a website you can check out. There are lots of air rifle and pistol shooters at our club and there are competitions available to enter
There is a club finder here you can use as well.
https://sts.azolve.com/clubfinder.htm
Good luck and welcome.