Trying to keep everything straight in a single browser window usually ends in a total meltdown of your accounts. These sites track way more than just your IP, so you really need a setup that isolates every single session from the others. You can read up on how to manage multiple online accounts on one device here:
https://gologin.com/blog/multiple-accounting/ . This guide goes into the technical side of keeping your digital fingerprints from crossing over and getting you flagged. It shows you how to run a bunch of profiles simultaneously, while keeping them completely invisible to the site security bots. It is a way to save your sanity and stop losing all that hard work you put into those profiles.