User Subscription as a Member Functionality

Hello,

Thank you so much for your previous help. I just want to know one functionality that about the subscription portion.

In our site, two type of member will be there. Like this —

Membership Types – Registered Members, Paid Members

Registered Members — anyone can register.

Paid Members — register member can update there membership by choosing the membership package.

So, my question is how the user can choose paid membership package portion by login in there profile from front end. And how can I make the package portion from back end.

Please tell me the flow, it will be very helpful for me then. Thanks in advance.

Thanks  & Regards

Suman Manna