Easier , make a product that cannot be downloaded , instead of selling ebooks , make an paid online eduction service where the added value is that you can ask q

Easier , make a product that cannot be downloaded , instead of selling ebooks , make an paid online eduction service where the added value is that you can ask question directly to the teacher giving the class, have your lessons updated ,etc... I'm a musician , i used to try to sell music online, now i sell my production talents to other musicians. That cannot be downloaded. So instead of trying to sell "goods" , sell services.