The first reaction to a diagnosis can be hard. You have to work through all the negative associations you have learned from the surrounding society about being "different", having a "disorder", and "Asperger's syndrome" - or being "autistic" or "disabled" - etc. There are a host of negative words that may be going through your head - or words that you have always looked at negatively up to now. You may have feelings of grief, and you are working through a major change in your self-concept.
That does pass after a while, and you can begin to enjoy the positives - the attention to detail, the special interests, etc ... the Aspie strengths. And you can begin to make accommodations for yourself: stop expecting yourself to behave like, and enjoy the same things as, everyone else (aka NTs). You may also learn new attitudes towards things like "disability" and "autism".
Exactly what you are going through may differ somewhat from the things I have mentioned, but the point is: you are going through a big change, and some of that is going to be hard while you adjust, but it won't last in the long term, because you will become used to your new self-understanding, and you will settle into gradually growing in self-knowledge, not just reacting to a huge sudden change.
PS: I was diagnosed in my 50s, about a year and a half ago. I had suspected I was on the spectrum for about 18 months before I got the Dx. At first I felt both grief and some depression - was I "defective", "second-rate", etc. But I have moved on from that negative reaction to positive acceptance, not by some deliberate choice, but simply as I became used to my new concept of myself.