If you’re new at this I wouldn’t jump too quickly. Go to RV shows and dealers, look at a lot of TT’s, and get somewhat educated before you commit. I’d even consider a nice, well taken care of used unit the owner has already taken the big depreciation hit on. Most people don’t really know what they want until they’ve used a unit for awhile, and then they find they want something else and take a hit to replace it.
And a comment I always feel compelled to make to newbie’s, know where you want to camp. A big unit is great for space and amenities, but the downside is it may be difficult to travel the scenic roads and get in the less developed campgrounds. And there will be fewer campsites available and you may find yourself planning trips and making reservations. Commercial parks should be fine and if that’s the plan, go for it; you have the TV to pull about anything you want. Good luck with your decision.