Pointers for the JET DST/Tunercat for a new tuner

Any pointers or suggestions for a new user to tuning, with the JET DST/TUNERCAT?

Help this newbie please

Welcome! What year/make/model? Is it stock or modified? what are you looking to do with it?

2011 Corvette Grand Sport w/LS3 Automatic.
AND
1988 Pontiac Fiero GT w/97 3.4L DOHC OBD2, Manual Trans
Wanted to start by reading the factory tune, understanding what I am in fact reading and then maybe start to tune the cars for N2O and or boost.