Neat little comic you've done so far. It's not my kind of story though (not your fault. I just feel like I see these high-school stories a little too often), and I also don't like giving any critiques when it comes to stories...it's never a fun time, and it always ends in a disaster.
I will say that you've done a good job at laying down the rules for your world. I've seen a few where they just expect you to know the rules of the world, and that's a confusing mess.
I only have two little gripes: one is that the perspective is a little wonky in the hallways, but that'll get fixed the more you practice.
Two is that the text needs to be a little more consistent in the text bubbles. And by consistent I mean that you need to try and fit the bubble around the text, and not the other way around. Without going "full teacher mode" it's best to keep the text in the individual bubble as uniform as possible, and only deviating from that when you want to express a certain emotion.
[IE: small fonts = whisper or shyness, big fonts = angry or yelling, compressed/italic fonts = nervous or talking really fast, etc...]
It makes it both easier to read, and really pops when you want to exaggerate an emotion. It's also good to plan-out the panels so that you can maximize the amount of text in the bubbles without erasing part of the background that you really liked.
Hope this wasn't too much of a read for you, and I don't really want to discourage you from making the stuff you like because the only way to get better is through practising...for better or for worse.