How to change the blog slug for multisite

Hi!

I was looking for this info and found out that it's highly recommended that I don't remove the blog slug, because odds are I'll have permalink issues in case 2 users decide to put the same name on a page. That said, seems like I can replace it with something of my choice (a word like "store", for instance). Is the way to do so Network Admin > Sites > Main site > Edit > Permalink Structure? I just want to confirm that and also know if there's any word I shouldn't be replacing the blog slug to (some word that might end up causing permalink issues).

Thanks.