Well, I've been reading it all. Even when I don't have anything to contribute.
This is pretty NORMAL, G. What you're going through at this stage of the process. PITA, I know, but I think everyone goes through this to some degree. You are spot-on that some of what you're feeling is excitement, I think. Your imagination is taking that energy and running with it through a lot of scenarios. That's something I normally do; but I ain't claiming to be normal in the clinical sense.
So, let's lighten this up a bit. Have a few laughs over it. The thing about education is that it isn't a life/death situation. My experience of being in school, as an adult, taught me that. It was absolutely one of the most magic and valuable things about it for me. Even if I failed a class (and I'd have to work really hard to do that; even in chemistry I ended up with a B) - NO BIG DEAL. I wouldn't be kicked out, or disgraced, or shamed or anything like that. It was like being in a total no-fail world where real risks didn't exist. For me, I need those 4 years of that environment. The cocoon. I even missed a few tests and had to make them up -- cocoon.
There is a TON of support in that environment and it makes it easy, for those who have already made it over real-life hurdles, to make the most of the opportunity. You know how to do that; you just don't know you do yet. It's an excellent way to drop out of real life for a bit, to a degree, and regroup your self, while furthering your occupational options. All you need to do, to access help there - is ask for it. Even if you skip over something on a form or put down info that isn't what they were looking for - you'll get a chance to fix it. The school isn't trying to keep you OUT, they're trying to make you salivate about wanting in, to set the hook so to speak. Yeah, they have their bean counters... and it's just flat out stupid some of the information they ask for. But ask it they do. The answers don't matter so much (you aren't being graded) and I think they realize that how you'd answer their silly questions can and does frequently change. I remember one student who legally changed their name, and it caused holy hell in the data system because the admin person he requested the change from, didn't update it in the right place in the database... so it turned into my job to backtrack through all the various tables and different web applications make the corrections.
Remember - just because you don't KNOW that environment right now - doesn't mean it's going to be impossible to deal with. So you can BE excited; start picking out book bags... LOL. Keep jumping through the paperwork hoops and deadlines and such. And pretty soon, you'll have the first day of school to look forward to. Save worrying about the OUTCOME of the process, when you're close to graduating. (And just tell the bean counters, what you HOPE will happen. Chances are it will. But you don't have a crystal ball to be able predict the future and it's counterproductive to tell them that. Ask how I know.)