I would put a circular lnb in first to help you find a satellite nearby. Try looking at 101w at a Directv transponder
freq12224
polarity right/vertical
symbol rate 20000
set your lnb freq to 12200
that should be much easier to find
at the top of your dish set up page it should say directv videoguard or something like that when you have found it.
you will at least have a frame of reference. find that and you are just a wee bit to the right of where you want to be and a little off on the elevation. mARK THE POST and the dish mount with a sharpie to make a match line.
My first attempt took 6 hours on 2 different days