ASP.NET Identity

I am a new in asp.net identity and I am trying to add identity in my project but unable to find any step by step tutorial for that. How can I add a new user to my application and how can I create a role and how can I assign role to user ? previously I was doing that all through asp.net membership, but how can I do that in identity ? is any tutorial available about asp.net identity ?

I am using visual studio community 2015 update 2 and my application is in ASP.NET VB, so is that any tutorial in asp.net vb ?