Welcome. I am new here too and also in the UK.
You said:
'Once I get a taste for it, I can't stop'.
I think that probably is a problem of sorts isn't it? I can be like that too - not every time but too often nevertheless.
I think it is great you are considering this. I am only on day 8 but feeling good. Why not give it a month and see how that works out for you?
Also, no support group worth its salt would ever judge you in that way. They are there to help - and there are lots of them around.
Best of luck to you, good to have you here.