Help with my Blog Directory Site

Hi! I am a newbie.

I seek help for the WP site that I am currently developing.

I just want a simple one that has these:
1. A registration page, where my users are required to enter their blog URL.
2. My homepage showing the most recent blogposts linked to the member’s blog site.
3. a page that has the top blog rankings.

I would need simple widgets to:
1. each member can vote each other’s blog post
and
2. each member can follow each other’s blogs.

I have been trying to figure this out in the past two weeks, but I would always have to start from scratch.

Thank you so much.