At the top of this page on the right hand side you will see "visit smokingmeat.com" click on it then sign up for the basic E-course. (lot of great Info)
then just look around. you will spend hours and hours looking around.
hope this help you ...
On intake you need to put nipples with caps on three of them. if you look at my build on of the pictures show them.
as far as space under the basket you need at least 4 inches for air to get under and for ash to fall.
there a lot of good builds on here . Just use the search bar at the top...