nothing will change unless you go and change them, if you start working towards your owns goals, no matter how small the steps, then you're doing great
I'm hardly qualified to be giving you this advice but you need to put yourself out there for those things to happen
i also felt very stuck at 18, don't beat yourself up about it what's important is that you just don't let yourself stagnate; all progress is progress and all progress should be given due credit and appreciation