Find a level place to set up the bucket for the concrete job.
Mix up and pour.
Put a large bolt through the end of your METAL fence post so it won't twist and shove it into the cement.
You'll want the correct diameter (see above), and I though I used conduit, but whatever it was, it's pretty solid.
You might have 10..15 minutes working time before it begins to set up so don't diddle around.
Use your level and make sure the post is plumb 'till it begins to cure.
Next day, it's safe to use.
Set in place and drop the dish's mount on top.
The mount will let the dish spin around on the pole for azimuth adjustment.
So, once you have the bucket in place and the pole plumb , you leave it alone.
Pay attention to everything DemonLord said.
Your other comments appear to be right on track.
I made some
comments in another thread about using the circular DBS satellites as aiming-stars for practice.
Up to you. If you have a circular LNB and want to try, the cheap sat meter will show you the way.
For aligning on the real FTA birds, I'm not sure it's of a lot of help.