I'm not sure if OP is still around. But I'm a single parent through adoption to a now 8 year old boy. I would have had a child using donor sperm if it had worked.
The issue with looking at adults conceived through donor sperm similar to adult adoptees is that the practice of telling children is now so very different to what it used ot be. Openness is encouraged, children know and can ask questions very early on if they have any, there
is always now the possibility that they will get contact with their donor and certainly will get medical information and basic information.
Having a child is essentially a selfish act. You aren;t doing it for the child benefit but your own, unless you are genetically engineering a scientist to find a cure for cancer.
You just need to think through your own peculiar kind of selfishness and work out whether what you want to do is on the more reasonable end of selfish and whether you can rationalise that to a child.
Many people have babies with arses who don't stick around, after one night stands, when they have no money or no job or no family or health problems. My experience of single parents by choice is that they pretty much think things through better than the norm and tend to be older and more stable.
I as so selfish in so many ways and I (and more importantly my child) have to live with those decisions - I adopted a baby boy from another country as a single parent over 40. You could call me Ms Selfish McSelfish (Professor of Selfish at Oxford University) but I'm happy and for now at least so is my lovely boy.
Good luck whatever you decide.