I would get a consultation to see if you are eligible for Invisalign (I'm not familiar with IBraces so hopefully someone else helps you with that). Invisalign is great because you can take them out when you need to, and they really are not very detectable. Regarding you being 19, don't be embarrassed about anything you get. It seems like a big deal to you now, but trust me - that is still very young, and the longer you wait, the older you get and the more you'll really wish you took these steps earlier. If you can afford it, get something done if you're currently not satisfied with your teeth.