https://www.camaro6.com/forums/showthread.php?t=564007
IMHO "The Tuning School" is the closest you can get to an actual learning relationship with a subject matter expert for learning to tune your LT1.
There is a ton of free theory and how-to's that should be enough to get basic engine theory. But take most of it for what it is- "free". You did not say what your level of experience is so forgive the simplistic answer.
Start with the HP tuners suite and learn to LOG and if you can get your own O2 sensor working, then you are on your way as a first hurdle. That would be a good test to judge for yourself if moving into the ECU edits is right for you.
Good luck!