How can you learn cue ball control without a good stroke and a fair sense of speed control? How do you know what to adjust when you're inconsistent where you hit the cue ball and inconsistent with speed? If you manage to learn it, you've learned it the hard way.
A much easier approach is to develop the stroke, then speed control. You now have good control of the variables, and will know which to adjust to get the desired result, and by how much.
After a few hour with a good instructor, a student should have the knowledge and enough experience to know if what the instructor taught is valuable or not by their own results on the table. They won't have mastered their mechanics or speed in just a few hours, but they should know it works, see a significant improvement, what to work on, and how to work on it. A good instructor should be able to clearly explain why what they are teaching does work, and a student should able to demonstrate it on the table for themselves. They should also be asking tough questions when something doesn't make sense, isn't understood, or doesn't seem to work for them on the table.
A much easier approach is to develop the stroke, then speed control. You now have good control of the variables, and will know which to adjust to get the desired result, and by how much.
After a few hour with a good instructor, a student should have the knowledge and enough experience to know if what the instructor taught is valuable or not by their own results on the table. They won't have mastered their mechanics or speed in just a few hours, but they should know it works, see a significant improvement, what to work on, and how to work on it. A good instructor should be able to clearly explain why what they are teaching does work, and a student should able to demonstrate it on the table for themselves. They should also be asking tough questions when something doesn't make sense, isn't understood, or doesn't seem to work for them on the table.