Looks to me like they are just censoring any instance of their username, possibly because it contains their real name.

Edit: also device name

It's mostly the account name and computer name, something like

user@computer $

OP might have a good reason (e.g network setup different/real name visible) or is just security/privacy conscious, but you'd be unlikely to dox yourself from a screenshot like this if you're not a power user.

Mint is quite a friendly distro, definitely a great first choice and one I'd recommend. However if you find it not to your liking but still want to try Linux; fedora is another good no nonsense distro that would be suitable for you.

If you wanna test linux use ventoy and use some distros without installing to see your preferences