I understand your fears.
However, I am autistic but wasn’t diagnosed until my late 30’s.
My DD was diagnosed at 9.
Her experience is so much better than mine was as we can talk about it and she understands herself. She understands that she is not alone and that there are lots of other people “like her” and that she needs to take time out when needed, that there is a reason she is so stressed out by things and a reason that she feels awkward around other children at times.
When I told her about her diagnosis (she understood about the assessment and we had talked about neurodivergency already ), I later asked her “Does that make you feel better or worse?” and she said “better I think”. I bought books for her to read. She chose to tell some people about her diagnosis.
Her experience of growing up will be so different to mine (I always knew something was “wrong with me”, in my mind, but I had no idea what it was 😂). It was really really tough at times and I wish I’d known so much earlier that I had a different brain and that there are positives there too.
Having said that, I still somehow felt blindsided by my DD’s diagnosis and felt I should have seen it earlier. I was also upset and worried about the future, even though I already knew it still felt overwhelming (at first) to have it confirmed.
My DD is also on a reduced timetable now at school as her mental health was so affected by being full-time. I still fight and fight for adjustments- as she masks in school and is seen as bright so school didn’t really believe me pre-diagnosis.
It’s hard going but we are doing it together and still learning together (she is obviously different to me in many ways, I understand her sensory issues and her autistic traits but we are still different people so I really need to learn about her and what helps her).
There is a Facebook group called Parents of Autistic Girls UK , which might be of help to you.
I strongly recommend a book called “Can you see me?” Libby Scott, which is
fiction but is written by a young woman who is autistic, and it’s about a girl surviving her first year of secondary school. My family members read this and I think it taught them more than textbooks did.
Finally, I recommend an Instagram page: thisisimmie , a very articulate young woman who talks about her experiences and who I don’t think was diagnosed until her mid-teens. My DD has watched the video clips and got a lot from hearing about the positives of being autistic.
Good luck, it it’s natural to be worried, but you can do this together now.
(If you want information about the organisation that my DD got her diagnosis with, then feel free to PM me. We got it NHS funded but don’t know it that is available anymore, I know they do private assessments though.)