I had the pleasure of backing boats int o the water for many years before we got the TT and yet I was very concerned about backing the big...heavy TT. As it relates to that...practice...practice...practice. After you first get it...go to a deserted shopping center and practice.
Having a partner that can help direct you is also a great benefit. Work out hand signals as to distance from the hitch and approach speed. Our truck has a rear camera & that helps lining up the ball very well.
Lastly whomever you buy it from should be able to give you a checklist for hitching up and detaching. Key issues are blocks for keeping the TT from rolling, learning about sway bars and how to connect and disconnect, the right length power cords and sewer hoses, blocking the trailer power hitch and a few others. Start reading all the good advice on the. Frog forum, take your time and make friends in the campgrounds. You will learn a ton from old timers. Keep a log after every trip and refer to it as your experience grows. You will find it to be great fun and a wonderful get away and experience. Good luck,