Check out Kustom Live Wallpaper, it isn’t a launcher but customization for the home screen can be had with some effort or no real effort.
There is just so much more to it but the reality is I did have a bunch of kids with the same woman and I didn’t want to be a shit parent like mine were so now I can’t see my life without them and it is worth it. As for what the future holds for them as adults and me as being an old man is still waiting to be seen but I wouldn’t turn away that life you described.
There are lots of people who are 40+ regretting not having kids and wanting their own now but it’s just getting tougher. There is always kids in need of good mentors so check out things like Big Brother, Big Sisters or maybe coaching if you’re into sports.
I have 6 kids but I still think about fostering kids since I can’t adopt (they don’t like single parents).