I like the discipline of weighing in at a meeting, but can understand how nerve wracking it can be. Have you been to meetings before? If you haven't, it might help you to know your leader never says your weight out loud, s/he will just tell you how much you've lost/gained. You'll never be singled out out as the biggest gainer or whatever either. You'll be allowed to set your own goal. My leader doesn't say 'oh your goal weight is ...', she says 'let's aim for losing 5%, then 10%'. Even if you don't stay for the talk (though I recommend you do, it's a great way of meeting people who understand, the support you get is great. Maybe you could join online, then go a meeting after 3 months when you're into the swing of it?