Hi and welcome
I'm sorry you're feeling shy of joining a group again. I haven't done WW for about 20 years so can't comment on that. But have found slimming world really easy and have lost 21lb in 8 weeks without ever being hungry truly.
I do understand the emotions involved in losing and regaining weight as have sadly done this a few times. I am hoping this time perhaps getting to my own goal and maintaining will be part of my journey.
Whatever you choose, taking the first step will be nerve wracking.. if you are comfortable with WW then do it!
and never forget that consultants have seen people like us before.. and supported them through re-losing weight. they're not there to judge you.
Good luck - look forward to sharing your journey either way.