I remember when I was 12. There's no way I would have agreed to go riding around the neighbourhood trying to make new friends! My mum signed me up for a few different sports. I sucked at most of them, but even so I would have preferred the embarrassment of organised sports to riding around trying to make my own friends! I'd look for some social clubs/classes for your DD - sports, theatre, photography, girl guides (is that still a thing?), etc.