Depends on the goal.
Some skaters manage to get famous through video parts. Some through Instagram. And a very small percentage through contests.
Most contest skaters nowadays need to start very young, have facilities nearby, and go to skate camps.
But there is a lot of competition in that route. Plus, you basically run the risk of destroying what makes skating so fun and appealing in the first place.
You reduce it to points, and a focus on that kills any kind of spontaneity and creativity that makes the majority of skateboarding interesting.
The vast majority of legendary skaters are not ‘contest skaters’. Skateboarding, unlike other sports, has evolved to allow all types of expression, despite the efforts of capitalism to make it a bland and uniform point system.
As such, you probably won’t find a lot of positive advice on these boards.
If the kid truly loves skateboarding, he/she will pursue it. Help them by giving them as many chances to skate as possible.
And if they love something else, help them with that.
It’s not about you.