A diagnosis can be helpful if you don't know whats going on and to connect with support. Otherwise try to avoid falling into the trap of wanting the world to cater to you because of a condition (it wont). But importantly by expecting the world to change or treat you different you become blind to the situations which naturally work better.
Theres lots of careers, jobs, etc that work well for being on the spectrum. Sometimes it can even be an advantage.
Ive seen people on all levels of the spectrum go on to have families, relationships, successful careers etc.
Realize the way you relate to the experiences as a kid will change over time.