Most Helpful Girl
The shyness thing you shouldn't worry about too much. You're still very young so there's every chance you'll gain more confidence as you get older and be able to have friends who are girls which should make it easier talking to girls you like. I'm shy too so I reckon I can relate better to shyer guys, especially introverts (people who need alone time to get their energy, as opposed to extroverts who get energy from hanging out with groups) 'cause I am one myself :') , and I'm way more comfortable one-on-one. Also never having a girlfriend? Dude you're 16; I've never been in a relationship (not one I count anyway..) and I'm nearly 20 :')
For me personally I wouldn't date you because of the age difference and also if you're a really strong Christian I think our worldviews would be too different (not that it isn't cool to be a Christian and everything it's just I'm not and a lot of my beliefs are quite different so I feel like it'd be a barrier)
There will be girls who like you though. I know maybe it seems right now like everyone you know is hooking up and you're left out, but trust me, you're far from being the only one. Hard advice to follow maybe; but you really just need to relax about the idea of having a girlfriend until there's someone you're really into.