Hello and welcome, Angel! Don't be scared! Totally normal to feel worried, but the groups are great (at least mine is and most of the ones I've heard about on here). The way ours works is you arrive, get weighed (!), get your packs sorted out for the week and raise any concerns you may have, and then have an hour or so of group work.
The group work is more fun than it may sound - people are free to share as much or as little as they feel comfortable with. For me they are one of the best things about LL, because I feel I'm not alone. Other people totally understand!
You will get LOADS of support on here too. This is a great site!
Cost - it depends if you're doing Lighter Life Total or Lite. I'm doing LLT and it is £70 a week, unless I buy water flavours or the savoury broth, which is a bit extra. I was almost put off by the price at the start but then realised I was frittering money away on rubbish anyway, and also paying the money somehow feels like I'm really serious about this. I'm making a real commitment to something, for me.
My LLC takes the money using a chip and PIN machine and I pay weekly, but I've heard that others take cheques.
Hope this helps - and best of luck on your LL journey!!