Quick Tor Question About Connecting?

I’m attempting to launch the Tor browser at my school however I come across a problem on connecting, not letting me open the browser. I start Tor normally and have “My firewall….. Certain Ports” checked (ports 80, 443, 9001, and 9030) and also I have “My ISP blocks…. Tor network” checked. But, being new to Tor I just clicked “find bridges” or whatever it says and the process was pretty random. Anyway, when I attempt to start Tor it gets me up to “Establishing an encrypted directory” and won’t progress from there. One time it went up past that and got itself stuck on “Obtaining relay information” I think it says.
I’m new to Tor, and all of this Internet security jazz but I really want to learn, I’ve read some stuff on Tor’s page and I can comprehend some of it but I’d like some help in more layman terms (Tor’s site is pretty simple but “official guides/documents/manuals” I’ve always had a much, much harder time with.Probably a psychological thing.) So can I get a bit of help please? Much appreciated!