I’m possibly the worst person to talk to about any kind of residential school but you know her @Lougle do what gives her the best chance at happiness.
Activities however are my kind of problem to solve. Does she have the patience for gardening? Ds isn’t really into it at all but I know lots of other kids at his college do a lot. Could she knit, crochet, tapestry, make rugs, weave, spin, tat, hand sew, machine sew?
Could she make models with wood, or cardboard, or book nook type kits, or dolls houses or miniature gardens or scenes like small world kitchens etc
Would she enjoy ceramics (ds likes the wheel), or mosaic or making a musical instrument?
What about a theatre group (we tried but ds couldn’t cope), or a sport? What do your local leisure centre offer, ours is lovely.
Cooking can be exciting especially if you go on a “course”, pizza express used to do days as did yosushi, but most cooking schools run short sessions on cooking bread or cakes or high tea etc
What about spa type activities? Massage/yoga/sauna/mani/pedi/hair/facial…could be very funny.
What about a holiday with lots of prep beforehand? Eg a flight to Spain, a couple of nights, and a flight back, prep learning about language, airports, plane, hotels, food. I know sounds exhausting but you can plan for ages and do lots of important looking things up. Development booster extraordinaire for ds,
I know you’re reading this feeling like all of it is too much and she couldn’t handle that or you couldn’t but my personal advice would be just try some of it and be crap at it or hate it or decide at the last moment you can’t. The wrong things fall away and the new bits make life bigger.
And do the same for yourself, it’s your life too.