Hi Group,
No need for a rudder indicator unless you have nothing left to spend money on.
Find center by turning wheel hard right then hard left and count the turns. If stop to stop is 5 full turns then 2.5 is center. As aleady mentioned, confirm by looking over the stern.
Backing out of slip.
Find out the prop rotation direction in forward gear, tie docklines tight, put engine in reverse, add moderate throttle then look at the flow of water at the bow. If there is more flow on the stb side u have a right turning engine and the stern will pull to port when in reverse.
So with rudder centered, with a port prop walk try angling your boat with stern to stb side of the slip, reverse with moderate throttle until the boat gets stern way then throttle to idle(which minimizing the prop walk)
Now the boat should respond more to the wheel than to the prop walk.
Practice on when to throttle down. You will want to get enough way on in reversing to be able to steer.
The boat’s have fairly long keels which is what makes reversing more difficult. Last resort would be a bow thruster?
Hope this helps. I just bought a 33 which is under major restoration so as soon as it is ready to sail I will test the reversing.
All the best,
David