Trying to get an "About the author" view to work on a multi user blog (contextual filters)
You don't need to create separate content types in D7, You are able to attach fields to the user directly (admin/config/people/accounts/fields). If you need more flexibility, use the Profile2 module.

If you just add fields to the user, you can create a new block view of users. Under "Contextual Filters" (which is under Advanced on the right side), add a filter of User: Uid, set it to Provide default value, with a type of User ID from URL, and check the checkbox for Also look for a node and use the node author.

Then add the fields normally as you see fit.