If you want it done right...... You need to do it yourself!
I often try to get photos from this website or others before I take on a challenge.
An awning install should have been a walk in the park.
I actually installed a full length awning by tieing a rope on each end and I threw the ropes over the trailer. I had my wife pull up on one rope while my son pulled the other from the opposite side of the trailer. When the awning was positioned where I wanted it, I tied the ropes off so it would remain in place.
I drilled the holes and applied some of the putty tape that you buy at the RV store, (it is very cheap and easy to use). I used olympic rivets on the awning. I believe that you could use screws if you like.
The awning arms should be attached to the ribs of the trailer. I recommend at least a number ten stainless steel screw to attach the awning arm brackets. Putty tape will work at this location but a good ol' tube of Vulkem may prove to be useful.
Jump in there and do it your self!