Here is how you park.
Idle up to the dock at about 45° with it on the starboard side.
As you get to the dock turn fully to the left when you are about 10' out with the boat still in forward. The boat starts to move parallel to the dock but not all the way yet.
Leave the wheel alone. You don't need to touch it again.
When the bow is close to the dock reverse the boat to slow you down. Doing this will pull the stern closer to the dock and slow forward speed.
If the stern still needs to go in more you let the boat back up a tiny amount and then apply forward gear. That stops you reversing and pushes the stern in.
Repeat as necessary.
I pull up to my dock forward and park it so the bow is out with ease. If you need to you can parallel park with less work than an I/O by using that technique. Just practice spinning in a circle. Don't touch the wheel. Leave it turned left and use the gears.