Advice for a newbie going to Magic Con?

Hi all! I’ll be going to Magic Con Chicago in a few weeks and looking to see what I should expect. I’m not necessarily new to Magic but I’m a very casual player (I have been playing for almost a year with a group that plays every now and then, I have a few pre-con decks, and a proxy deck I built), but I’m also a big DND fan. I’ve never been to any kind of convention before so I’m really not sure what I’m walking in to.

What have peoples other experiences been with cons? What should be expected, avoided, things not to miss, etc? Any advice is appreciated!