u/Different-Barber-834

Hi guys I found my old PS4, it's Version 9.03. I've never done a JB before, there's so many ways to do it online and I'm pretty lost. Is there a best way to do it for my version 9.03?

Also side question do I need to make a new psn account, I don't think I want to use my main one that I use on my PS5 right? Thanks.