Headline not showing: iTunes help needed.

It's been years since I updated my ipod because I just used streaming services like Spotify, but I'm starting to exercise so I've been going back to my ipod nano, which is nearly 10 years old now. In fact, possibly older. God.

Anyway, I've changed computers twice and can't remember any details about my iTunes account, including the email I used back then. If I get a new account and plug my ipod into there, will it wipe my current songs? Some of them I downloaded illegally back in the day.

I did try to google this but it was all quite techy and usually referred to someone just changing computers, not accounts. Advice?