Off Market Deal Help

[Nicholas Dale Aulby]

So I am currently in the process of buying my first property to live in then rent out in a couple of years but I am trying to do it with out a real estate agent. The man I am buying it from is selling it for what he owes on it which is way under value for the area. 

Could someone help me with the steps I need to take for this offer to go through?

I have seen the property and it looks like all it needs is a little rehab; paint, carpets, and the yard needs cleaned up. I have as of today ran my credit and I am approved for the required amount he is asking for. 

From here what steps do I need to take or forums I will need to get a hold of to continue on with this deal, and so on?