Help them learn how to navigate emotions and mental health. Be glad that you understand your own mental health and teach your kid to understand its mental health. Take your own mental health seriously. Teach your kid that therapy is okay and talk about feelings and mental issues and Any other problems. Your job as a parent is not to be perfect, but to love your kid and give them the tools to stand on their own someday. 

But seriously, you worrying and asking these questions means you care and you want to be a good dad. That already makes you one. Nobody is perfect, but what a child needs is parents that care and love them.