IMHO I wouldn't sell If you have a desire to use the TT, take your time to get the right equipment installed and set up, read the manuals to learn how to use the various appliances, youtube is a great source and if you have any friends how owns one (MH) they can help out too.
I wanted a TT for 20 years and knew nothing, I bought a 24' TT (27-28 full length) last year and knew nothing about how each of these systems work, the dealer ran me though a simple demo but after learning which button did which, I ended up learning from reading on forums and from others as well.
Not sure about the feed back here to sell it. You came to an RV forum to learn as I did and they are sending you back to tents? I learned how to winterize via youtube. I believe there some here that are out of touch as they may have owned an RV for many years and discount the fact they started out from scratch as well.
Hope you get it going and start using it!!!