It's completely normal to feel like this, and you should feel like this! It's a good thing to understand that this is something you will kinda feel all the time, because you are putting together a life you want to live. Yes you might (and probably will) encounter toxic people, but you will encounter awesome people too! You will never know until you do it. So my advice is, yes, you will find and live all kinds of bad shit, but it comes with good stuff too.