Greg,
Welcome.
I recently bought my first camper trailer. The things I think you need to get your head around first are...
What are you going to tow it with, hence where are you likely to go (real offroad, sort of offroad, or just mainly sealed roads), where are you likely to stay (offroad out of the way places with no power or mainly caravan parks), and then start using the search function, and buy quality aussie canvas on an aussie trailer.
If you've been camping, you'll have a bit of an idea then of the sort of things that would make you comfortable in the setup of the CT.
Best of luck...its a journey.
Mark.