Tips for use of Whites MXT please

[dzdilla]

Hey everyone, I'm new to the hobby, I got a Whites MXT this past summer. I am really enjoying it, have found clad and an some wheats, and an Indian Head.
I feel like over all, I'm a little overwhelmed by the machine. I get crazy readings bouncing all around, and sometimes have a hard time pinpointing.
I have a few questions, any suggestions on settings for gain and elimination settings?
Are the areas I'm searching really trashy or is this pretty normal?
I have read about different coils, would you all suggest a DD coil for trashy areas? Any brands/models suggested?
Thanks so much for all your time and input. I have a blast reading about all of your finds!
~Dan from PA