Let's face it, some people don't cope well with parking in Sainsbury's, let alone driving with something several meters long behind them.
But everyone has to start somewhere, and the best place to start is with a towing course. It's the best investment anyone new to caravanning can make; you will learn all the theory first, and then you can practise somewhere safe (i.e. not on public roads) with an experienced instructor to show you how - including reversing. Both the Camping and Caravanning Club and the Caravan and Motorhome Club run excellent courses - and they have their own caravans you can use. Highly recommended!
Another option is taking your driving licence along to the regular caravan shows in Birmingham or Manchester as there's usually towing taster sessions available provided by the Caravan and Motorhome Club or the Camping and Caravanning Club. They usually have a small fleet of cars and caravans available (so you don't even need your own) - and someone to go out on a short, local route to show you how. Better still, they're free, so what's not to like