Accessibility

Hi all.
I'm quite new to this whole thing and am nervously dipping my toe in the waters of naturism. I have not been to a naturist beach / outdoor location before but would like to try it out. I have a disability that means my mobility is not great. I'm not in a wheelchair but I really struggle with uneven ground and with lots of walking. From what I've read, the good beaches can be a bit tricky to get to. Can anyone recommend a beach / lake / outdoor swimming pool that might be easier to access? I'm based in London but have a car so can travel further afield.
Thank you