If the coach is good, then this private teaching class is worthwhile. I practiced it myself at first. I have a good foundation. After practicing for a while, I injured my left wrist and kept it for half a year. I hurt my right shoulder. It feels like seven years. It is uncomfortable to practice. It doesn't mean that consultation and practice won't hurt, after all, it is more likely to be painless. The rest depends on your own financial ability. Ability is generally bought less, at least getting started. Keep buying if you can. You can apply to change coaches and experience different coaches. If you can't afford it, learn to watch videos and buy books online.