my brain doesn't believe my ball will move as much as it does yet, if that makes any sense
It makes perfect sense to me, you are not alone, there are many bowlers with this problem that don't even know they have it.
Here is an exercise you can do to get your head on straight. Ask for permission to place a piece of tape on the one board 30ft down the lane. After asking for permission and making sure the gutter cap is safe to walk on, take a piece of white bowling tape and find the 30 ft mark, the arrows are at 15ft, there is usually a splice in gutter pieces 1/2 way from the foul line to the pins, place the piece of tape on the one board.
Next using any ball that you don't mind a scratch or two if it goes in the gutter. Standing anywhere you want on the approach, roll the ball between the second and third arrow and hit the piece of tape and have the ball go in the gutter. Ron Clifton will bet you $200 that you can't do it on the first try.
This teaches your inner control freak to let the ball go where you want it to without fear of the gutter, or trying to steer the ball away from the gutter. This is a great drill because it teaches you to get the ball through the heads on the line you want it on and trust that the ball will come back. Most of the fear is not trusting the first 30 feet, if you can get that behind you then you will be able to develop a feel for your limitations.