How do I live happier after read The Subtle Art of Not Giving a F*ck

For more than 40 years of my life, I’ve been concerned about so many things. Until recent years, after reading the book “The Subtle Art of Not Giving a F * ck” written by author Mark Manson. I realize that I have “cared” about the issues and things around me as much as I have tried to find out.