The answer to all aspects of all parts of your question is in the learning center data. My short advice is as follows.
url trackers example
if this is your hubs url
hubpages.com/hub/your hubs url title
assuming you set up the url tracker - as explained in learning center with _newMem as the added portion.
this is what your url tracker should be
hubpages.com/_newMem/hub/your hubs url title
As to how to help attract traffic to your hubs you need to mention your profile, or better yet each hub, in other sites (the higher their page rank the better) that have DO FOLLOW links back to your hub.
Some DOFOLLOW sites are
and there are others.
You should submit your profile page to as many directories as possible. This is a good place to start because it is a free service. submitexpress.com seems to work well.