Welcome! I'm out in Issaquah and hoping to do a few offroad trips this summer, hit me up if you want to do a local cruise sometime. I second the "tall and heavy bike" comment, this is my 3rd bike (about 18k total miles on 2 wheels) and that top heavy part was tricky to get used to. The only thing the AT will have in common with the bikes you ride in class and to get your endorsement is that they both have 2 wheels and handlebars, everything else will be drastically different! I applaud you for buying a great bike but I can't imagine being in your shoes, you have a steep learning curve ahead of you, good luck!