Don't worry too much about the current. If you find the current is running the wrong way just stay shallow, 20 to 30 ft, not going over down the drop off. Loads of nice coral, plenty of fish and it's usually where the Turtles hang out. There you find little to no current and probably get the surface current helping you out. It's not very far, about 300 yards at the most. Done it many times, also when current was wrong way, never any problems. And IF it gets really tough, which I highly doubt, on the surface the waves will push you there...
Go slow, better to come up a little short rather than overshoot. If you overshoot it could be hard getting back to Karpata in the shallows or on surface.
It's not difficult to find where you have to park. Look for rock pile on left side of the road, parking for about 3 cars on right side of the road and there's yellow paint on the left side of the road. I would be more worried about finding the right spot to jump in. Two criteria will put you in the right spot... the jump in/cliff should be no higher than 1-2 feet. And at that point, looking straight out to sea, the buoy should be at your 11 o'clock. So slightly off to the left of you.
Leave your truck and get it later. That will save you organising, get to use the tail gate for getting your gear on and save one person from standing and waiting in the sun while you bring the truck away. Better to hang out under a tree at Karpata while the other gets the truck. Have fun