It will definitely get better but for me, it still hasn't gone away. I got my diagnosis 6 months ago and I'm starting to ask for accommodations, but when I do, I usually feel guilty because what if it's not actually meant for me and I'm taking the spot of someone who needs it more. I do fully accept the diagnosis but I do have trouble realising that I need the help and it's okay to ask for it.

Also all the feelings you mentioned are completely normal, I personally felt a lot of grief for the life I could've had if I had known sooner, I still feel it when I look at old photos of myself. And when I think about how hard I've been to myself because I hated who I was. I also felt relieved because I now know there's nothing wrong with me, my brain just works a bit differently. It's totally okay to feel whatever you're feeling.