Yeah there's no restrictions, but keep in mind that voting power is limited and recharges daily. So you may want to put in some time to connect with authors that share the same interests as you to get them to read your posts, etc. Hive does have one of the easiest barriers to entry and rewards, though, so it's not as difficult to get to a place where you earn consistently compared to other platforms.
RE: Finally in in this blogging platform. A long time crypto writer ready to share my knowledge and experiences.