This is coming from a girl who fluctuated between completely bare-faced except for powder and lip gloss in her early teens, to light foundation, to concealer-foundation-powder-AND-blush back to completely bare faced again, with the occasional cherry red lips or crazy eyeshadow colors in between.
Light makeup, when applied correctly, will help you look like you, but better, and help you avoid looking washed out or ho-hum in your photos. Especially since, as someone pointed out, your wedding party and guests will most likely be wearing makeup, and probably more than they normally would.
If you wear nothing else, mascara and lip gloss. I only started wearing mascara very recently, and it doesn’t feel like you’re wearing anything but it makes your eyes really pop. I’d recommend a trick I read somewhere, where after applying a coat to all your lashes, use the tip of the brush to add a bit more to the very outer corners of your eyes, just a few of those lashes. It makes a huge difference.
And a lightly tinted lip gloss will accentuate your lips without looking fake, and is easy to touch up every so often, or at least before you pose for pictures.
Any more than that and you might not be comfortable, but eyeliner will bring out your eyes and won’t give you that cake on your face feel. Although- after 10 years of wearing eyeliner, I still suck at applying it, so I’d recommend enlisting a friend to help with that part. Maybe a translucent powder, it’ll keep shine away and even out your skin.
But like others have said, if you won’t be comfortable, even with just lip gloss, don’t bother. There are too many other things to stress you out, and you don’t want the makeup to be more of a hassle than it’s worth.