Think you are right when you say there isn't much out there on the up sides of single parenting. But I've found a few things:
The book 'Happy Single Mother' is a breath of fresh air. I wish I had found it years ago.
Frolo is a friendship and more recently dating app for single parents.
Mine is now a teenager (blessings and challenges) -
It is sometimes hard - especially during pandemic and lockdowns.
Even though - historically of course there have always been single parents - people who are divorced, widowed, leaving DA, partners have walked, estrangements all kinds of different reasons - wanting to go it alone...
One in four families are single parent families - but we do not feature so much in the media - in a positive way - and there is a lot of work to do with regard to policy making in government to reflect that as so many things impact us differently.
Some organisations do not get our reality. I read an American blog once can't remember which one - which said we should be given protected status. I agree.
There is gender bias - as I think a cartoonist pointed out - a single man alone - is often given sympathy and support - but a single mum is criticised often and blamed also. Judging by the nasty comments in the past by the likes of Boris and co regarding single mothers you would think we were responsible for the entirety of the world's ills.
If you have enough money to go it alone - why not? It's an achievement, a growth process, you have to dig deep, there are happy moments,
As others have said put support in place. You may find your support network surprising.