Not hard to do but you need 2 people to bleed it. You can go to the website and look around it has manuals online(free) that describe it.
In a nutshell, turn wheel hard to port so that the arm is fully inside. Get a hydraulic filler kit from auto parts store, just a little tube. Attach it to hydraulic opening and hold upside down. Have your buddy loosen the hydraulic nipple on the arm attached to the motor. Slowly turn wheel to starboard until the fluid runs out of the nipple. Tighten everything back and it should work.
To properly bleed this system you have to do it in BOTH directions and bleed until you do notsee air bubbles.Don't let air get in the helm. Keep the tube full of fluid until you close the valve. You can pick up the tube at West Marine when you get the Sea Star fluid.