You can buy Fortnite lessons
Kids in America are getting their parents to buy them Fortnite lessons so they can up their skills and have a better chance of winning in the massive 100 player matches.
If you've been on the Fortnite craze, then you'll know that your first few rounds can be a bit hit or miss (literally) but it's anouther thing all together to pay real money just to get better.
The coaches are professional players and you can find them at sites like Gamer Sensei. Lessons are around 10-25 dollars each which isn't too bad compared to the price of learning something more normal like an instrument.