I have towed everything from boats to small utility trailers to large semi trailers. My advice is to borrow someones small trailer and get a hang for
which way to turn to get the trailer to go the way you want. Try to remember that when you back a trailer it is the same thing as pushing it from the front yourself.
The larger the trailer the easier it is to back because they simply move much slower. If you went from a 12' utility trailer to a 22' trailer you would find that it simply did
not turn as fast and you just start your turn earlier. If you want to borrow a small utility trailer let me know and I would be happy to let you play with it until you felt secure.
Good luck,..... we have a 38' motorhome and enjoy it. We tow a small Geo Tracker behind it and cannot feel it at all. Let me know if you want to back a small trailer around.
The key is go slow at first simply pull forward and start over when it goes too far the wrong way.