Sorry for the essay - From this latest post, you do sound like you are now in a good place to start to make even those little changes - even just writing it down here shows that - some replies are great, with good advice & recommendations, some seem just not manageable & a bit hard on you - (the 'why not' type don't really help someone who is struggling - with weight or indeed, anything else).
Weight loss drugs - maybe worth trying if you can (yes, I have done & recommend Mounjaro, & lost my goal of 3 stone in about 4 months) - so, it did work for me - but its not for everyone, and now not always available & it's suddenly getting very expensive. (Sorry, that bit isn't helpful at all.....😶 - except that you do spend less on food, as you just don't want it....).
(eg - I used to be able to scoff a whole bar of chocolate in one go, but now one lasts a week...😇!!! If I even bother to buy it).
Luckily I have reached my goal - and no, since stopping the Mounjaro I haven't had any 'rebound' effects - I still eat less & better / healthier than before, and that feeling of getting into a whole new (well, my old wardrobe) of smaller size clothes is lovely (eg - not needing to wear the long floppy 'coverall' T shirts etc). Not to mention having more energy, clearer skin, able to wear shoes with heels again, lol, and therefore more incentive to stay this size.
Maybe write a 'blog' or diary - not public, but for yourself?
Your daughter sounds very wise for her age, (she will love you whatever size you are - she is just asking intelligent questions that she has thought about) - please update how you get on, whatever route you take, and however long it takes. Good luck - & don't be too hard on yourself - you sound like a lovely person, please take just one of those baby steps tomorrow, it may not happen overnight, and you may have slip ups, but you will get there as you know you want to.🌹❤