I genuinely don’t like being around kids or teens, they make me uncomfortable, so I wouldn’t like my younger self. Also I was a horrible child, according to my mother throughout my childhood, so.. yeah.
I’d help my 10yo self, but I wouldn’t take myself in and raise her or whatever; I’m far too negligent for that (why I’m sterile), and having had a negligent single parent myself, I have no interest in passing that experience down. Alternate me deserves better than I could provide. It would be a more frustrating version of my own shitty childhood if I did it - at least my own mother wasn’t physically disabled. And she only had the ‘tism (undiagnosed but almost certainly where I got it), where I have adhd and the ‘tism, as well as a slew of physical issues (headaches, back pain, digestive issues, bad joints, etc.) that would mean I can’t be fully present for a kid, even myself.
But I could probably mentor myself; I know where we fuck up and why, and if I could prevent that suffering (not necessarily change the way our life shakes out, but take away the negative feelings about it that took me decades to work through and are still a problem sometimes), I would like to. I think if I’d had some sort of supportive role model who wasn’t arms-length (seriously I have no memories of being hugged as a child, but lots and lots of being punished..), I’d probably have turned out way less of a disaster.