Hiya mate,
as most people have said, they cant teach you to reverse, its jus all practice.
I’ve been doing it for 14 years, and sometimes it goes in first time, sometimes it goes back and forth like a lawn mover.
The only thing I can say is keep ur cool.
Its a pain up the garry if your holding the road up, people tooting and shouting at you, so they have to wait a minute, but it costs a lot more to repair walls and cars, and the time spent on accident forms isnt worth it.