Need help for air flow arrangement

Hi guys,I need some help here  

Today my friend bought me this case from one guy for just 15$  ))

So let's start with the front view,where I have 1 80mm fan for the hdd.



It has of course 2 side doors,1 is full and another one is this:



And this is the back view:



I'm gonna put new build here and I wonder how to manage the airflow? I mean what fans where to put,which ones go for blowing air out of the case and in the case etc.

Sorry for kinda noob post,just doing this for first time,thanks