Hello, fellow newbie! We were recently tenters ourselves. Our new HTT is almost identical to yours (Travel Star 229TB). We have found it to be more than spacious and very comfortable, as I'm sure you will also find. Stupid newbie things we've done so far: Broke a wheel chock when we forgot to remove it and backed over it, blew a fuse while attempting to run a toaster oven AND space heater at the same time, burned a teensy hole in the tent end when a stray cinder blew onto it (in our defense, it wasn't windy and the campfire was 30 ft away), lost the spare set of keys in the grass (later recovered after lots of swearing and crawling on hands and knees).
Lots of good times are ahead of you and remember to share your screw-ups on here....we all need a good laugh!