If you are not running your own instance, and I don’t think everyone should go down that rabbit hole, have a moment to go through your options where to register. The distributed nature of Fediverse doesn’t work if everyone packs on the same server and the local feed is more useful if the content is culturally or ideologically local for you. Also keep in mind all this is still emerging and things are developing fast. There will be growth pains both technologically and what the rules for servers not being kicked out the greater Fediverse will be. Some servers have already been cut out for being extremist or allowing illegal content.