just to have an idea of where you stand with regards to accuracy and consistency to hit center cue ball
and maybe have realistic expectations
take alook at this from mark wilson's book
View attachment 870960
There are few people I am less eager to disagree with than Mark Wilson but what I see here isn't a true representation of what I have found. An entry level player with an hour or less of instruction on the bridge and stroke will hit the cue ball in an area maybe one third that area or 1/3 the diameter. The Average pro player and elite player will both hit much smaller areas.
Another issue, these representations on a whole group around the center. That is not what I have seen in testing without telling people what I was testing for. A man that only plays once or twice a year looks at the cue ball last and hits the cue ball far more accurately than the elite professional player in this image. Another man who was a once or twice a month player, maybe a high C at best, also said he looked at the cue ball last and hit it with very close to perfect accuracy.
When I just snagged people walking by my table at Buffalo Billiards, pool room bums of various skill levels from high C to AA or Shortstop to try a shot I found in my sampling of about twenty shooters none hit the cue ball accurately trying to make a shot. After three to five shots I told them the main object of the exercise was to hit the cue ball accurately. Then they all hit the cue ball with near perfect accuracy. These were guys that played 20-40 hours a month at an estimate. They didn't focus on hitting the cue ball accurately normally. They could when they focused on that aspect of the shot.
Speaking for myself, when I am out of stroke I hit the cue ball one-eighth inch high and one-sixteenth inch left. I do that if I have been laid off a couple months or a couple years. When I get back in stroke I hit the cue ball exactly where intended. This is why I don't see an issue hitting centerline or dead center ball, talking along the outside of the ball of course!
If I were teaching someone I would let them do other things enough to stay interested but they would spend a lot of time just hitting a ball until they could hit it where intended.
I think too long of a bridge copying pro's and the open bridge are the primary causes of issues hitting the cue ball. It ain't that hard!
Hu