Human verification will go away shortly but for reasons of security, I can't say when. As for modifying your profile, your initial post in introductions contains the answer. Cindy gave you the greeting links and it it you will find that your profile unlocks after 15 quality posts. If we discover post padding, we will take that and several other privileges away until we are able to verify that it's safe to allow you access to those features.
This site has become a desirable target for spammers, trolls and other undesirables so we do our best to eliminate them before they become a problem in order to give you the best possible experience on the site.