I found using a meter to be more of a hindrance than a help.
There's already a good video meter on your TV, and you'll never shoot the wrong sat. Problem is, no beeps. Sooo.. I use a Swift Hitch camera to 'see' the TV screen from outside.
I get the settings from either the zip code, or dishpointer.com, and using a boy scout compass, can usually do it pretty quickly.
But yeah, the first dozen times will be a learning curve, for sure. I hope you have a good, solid, stable tripod, because that's about 90% of being able to aim a Slimline.