Well, now that you're on the Transportation Board, if you look around, you'll see that buses from resorts to parks start running around 6:30, to accommodate breakfast ADR's.
If you're at the Kidani bus stop at 6:30 for the first MK bus, you'll get to the MK by 7, which is when the Resort Monorail starts running. You should have just enough time to get to Ohana for your breakfast.
When you board the MK bus, ask the driver if it's the way to get to the Poly. The driver may offer to take you there directly, but don't expect it.
(BTW -- there's no apostrophe after the O in Ohana; it's Polynesian for family, not an Irish family.)