yes, recent diagnosis can be overwhelming! Everything looks different once we see how autism worked in our lives for so long and yet nobody knew. I was diagnosed a few years ago at the age of 68, and it has taken a long time to sort out all of the past, painful whys, and misunderstanding, conflict, just all of my experiences before diagnosis. This new perspective changes everything.
Give yourself time to work it out and you will gain understanding of yourself, your past, your interactions with others up til now. there is certainly a lot to sort. Do your best self care. You are likely to be angry, afraid, sad, you may feel full of grief or you may sometimes be excited, and a whole bunch of other emotions as you work through it all.
Its OK to feel almost every/any emotion over a new diagnosis as an older adult, and there is no shame over it all, nobody knew!
For me diagnosis was a huge relief because it finally made sense of the 68 previous years of my life.
I have had plenty of "lightbulb moments" or "aha moments" when another memory finally snaps into place with the answers that autism provides. I am going to be 73 this year and life keeps getting better as I sort it all out and figure out "work arounds" that make every day living better and less distressing.
Eventually, things will start coming together, and you will feel less confusion and distress as, bit by bit, all the clues fall into place and begin to make sense. Cheering you on. One of the best things about finding diagnosis was learning I was not alone, but that there were many others "out there" who actually understood, and could relate. That was a relief!