Learn to use your side mirrors, even while driving a car - learn what they show you. Don't use the windshield mirror. You might already do this if you drive a truck.
Towing going forward is easy - just go. The trailer will follow. When you change lanes, make sure there is no vehicle alongside you. Learn to use those smaller curved mirrors! They will show if "something" is alongside you, even if you can't figure out what it is.
Backing up is the big deal. As people are saying, find empty parking lots and practice.
Stick to speed limits (or slower if needed), especially on roads you don't know. You may find that those seemingly slowish speed limits on side roads that seem annoying actually become important when you are towing. Pay attention to those "curve ahead" signs - they are talking about you! Not the sports car ahead of you.
Ask questions in this forum about towing. When you are ready to go on a trip, ask here about your route - suggestions, road conditions, construction, things to look out for. You will find that someone probably just drove that route yesterday!
See you on the road!