Hi Ed, welcome to the forum and congrats on your "new" Sunline.
We were all "newbies" at one time. I am sure there will be others here that can point to some good resources but all I can do is share a little of my own experience. My wife and I tent camped for may years then moved up to a popup. Even though I bought it used the dealer spent 2 hours showing me how to set up and take down and a lot of good tips with a pop up. When my wife and I decided we wanted to move up again to a TT we spent a lot of time just looking. During that time I read a lot of good (and bad) stuff on forums like this. (note: the bad was from other forums, not here) I also spent a lot of time talking to friends and co-workers that owned or had owned a TT. By the time we purchased our Sunline I had a handle on things like tow ratings, hitches, weight distribution, sway, black and grey tanks, leveling and etc. The rest we picked up as we went along and we are still learning.
Feel free to ask questions here and remember, there is no such thing as a dumb question here and a lot of good people with experience that are willing to answer and help.
Gene