What are the differences that you can give compare to the free courses that are spread all over the net? I mean if it is premium then you should have some excellent service that you provide to your customer like how your coaching can affect the players style.
And I see that you are confident with your service, can you drop here some of your past clients that become successful using your service or any of the forum members here genuinely use their service and they got a positive result. Any positive feedback will surely boost the number of your clients as no one will take the risk if they are not sure to gain something to what they have paid.
There's a reason some stuff is free while at the same time many courses sell for thousands of dollars.
Don't get me wrong, you can get valuable content from free youtube videos (including from coaches who sell the most expensive courses) but at a certain point that's just not enough...
I do have clients who are very successful players but there are no miracles.
You can have access to the best courses in the world. If you're not willing to put in the work, they will do nothing for you.
Now, if you're committed to studying and working on your game... then these courses will help you tremendously!