what should I do to keep and increase Bitcoin?

hi, I’m a junior student. learned something about Bitcoin about 3 months ago from an internet friend. I’m confident about it after reading the White Book of Bitcoin. So now the plan is that save money from the cost of living then time input those money and keep it for a long time. So what strategy should I try to do? another question is that now I am trying to everything about Bitcoin, what book I can learn from or whose YouTube channel I can subscribe to？ I’ll very appreciate it if someone can Solve my confusion.