Help reading spark plugs

UOP said
What part of Dallas are you in?

Actually I am here in Plano.

I have been doing just some driving on the surface streets and a few stretches on 75 up towards Allen. The plugs were pulled after about 30 or so miles.

...install 02 sensors and wideband a/f gauge and you will know for sure.
^^^THIS^^^

What is a good sensor to go with? Looking for ease of install and decent readout with easy use.