I'd suggest that before purchasing, there is a lot of good information, not only on this site but on Youtube as well. If you're able to, go to an RV dealer's lot and start seeing what they have, what the build quality is like, etc. RV shows are also a good resource of not only checking out what is out there but actually purchasing. My first TT purchase was the result of attending an RV show.
Good luck. You'll find many people here that can help you with questions.