Ppl are offering great advice about where to start, and it’s what I’d suggest too - start with car camping to get a feel for it. If you overcommit too soon, you could ruin the experience for yourself. I know many ppl who will never camp again because they treated it like a hotel stay, got rained out, and decided it wasn’t for them lol.

A couple of resource suggestions - you mention an interest in self sufficiency. Read the SAS Survival Guide by one of your own, John Wiseman. It’s my go to for general survival tips and skills, including the ones I hope to never need. But lots of good info just to be aware of too.

Some other great resources can be books on flora and fauna. One I have sitting on my desk is the Canadian Outdoor Survival Guide. Obviously it’s for Canada, but it teaches you edible plants and behaviour around some bigger beasties (I don’t think that’s an issue in the UK).

And a final thought - an old Parks Canada marketing slogan is a really good nature-respecting thing to keep in mind: Take only pictures, leave only footprints.

Nature is in our backyard, but it’s home for the animals that live there.

Happy camping! ☺️