Hey, I know this is a guitar forum but I thought some of you might be singers out there as well. I was wondering if there were any mini mic amplifiers you can get that you can plug a mic up to and amplify your voice a bit, but not a ton like a huge PA amp.
Try asking the guys in the singing thread stickied at the top of this forum to see if they can recommend anything, if not - try the Riffs & Recordings forum.