I feel your pain!
I've been programming lathes since 1985. We have one Okuma in our shop. Think it has the OSP700 control. It is programmed and set-up by the other lathe programmer. I have no problem programming it, but setting it up is a different story. I too am use to Fanuc controls. Had to set it up a couple times the past few months.
Don't know if the control on your machine works the same as ours, but moving the axis as far as it will go in X & Z plus allows the turret to index with the button on the control...I think. LOL. This much I do know. In Auto mode rapid traverse cannot be controlled by the feedrate override switch unless the machine is in single block mode.
None of the Fanuc cycles can be used on the Okuma. G76 is G71 (I think
) on the Okuma. Forget Macro B programming. I do like some of the features on it.
I just looked and saw that you have had 3 months with which to learn it. Now you can teach me.