start at the beginning
The derailleur should be a flat screwdriver head above the big chain ring 1/16". The outside of the cage runs also even with the outside chain ring.
Next DON'T HOOK UP THE CABLE YET!
Put your rear derailleur in 1st or the lowest gear. Turn the crank and adjust the "L
" so it almost rubs the the chain. Depending how much flex your crank and B/B will have will make the chain rub. This has nothing to do with the adjustment.
Now Click you shiffter all the way to low.
Pull the cable taunt so when you twing it. it moves like a loose gituar string.
The second click is called TRIM
which is designed to move the derailleur over just a bit so the chain won't make a groove in you cage.
Here is where you will get stuck... It is OK to bend the derailleur cage!!!. Taking what I use is a cresent wrench. on the INSIDE of the cage. Bend a very small "J" pointing the tip to the larger sprocket, This should do the Job.
Now shift the rear derailleur to the smallest. Click the shifter one more time and adjust the "H
" so the outside of the cage almost touches...
May the force be with you