Being a father at a later age is different from when I had my other two daughters when I was in my 20s and 30s. If you're in your 60s and you're with the kid every day you're dealing with the mind of a child so it opens up that childishness in you again.
And I don't have any specific steps to take because I don't start the same way every time. But there is a knowing when it's enough and you can leave it alone.