Yes. You have every right to identify as lesbian if you think it fits. There will always be some people who judge you on your past but they aren't the people you want to be dating anyway. You don't...

sexuality and sex drive are Not an exact science, though it absolutely sucks when they don't match up comfortably. You could of course be ace-spec, though it seems like you're already aware of that...

I still listen to Raffi songs occasionally. It's partially a nostalgia thing, partly that I legitimately like the tunes. IMO there's no being "too old" to enjoy something childish