Hi emmanocats, just to say the best of luck to you and no, not impossible at all, you will be fine! I'm still doing maintenance with them so my advice would be to carry on with the support after you have finished losing weight, that's almost the hardest part imo after the first few days have passed. Try and keep yourself really busy and away from food as much as poss but also be kind to yourself, you'll probably need a few early nights in the first couple of weeks then you should find you have even more energy than before!
Are you doing by post or going along to groups?
Really good luck and look forward to hearing from you again soon,