Yes. It will consume some resource credits, so as a new user, it may not allow frequent editing/posting/commenting. Also, while you can edit a post title, the URL will remain the same. All tags except the first can also be edited, or you can add more, too.

I'll delegate some Hive Power so you won't be likely to run short of credits while you get started. Also, your upvotes will start to carry some weight!