It's hard, or you wouldn't like it. A lot of coaches really don't like what they're doing.
When you are playing, it is so hard to think about what life will be like after football. I understand. When you are playing, and you are young, you think you can play your whole life. You think it will never change. But it will change. You can't play forever. No one can.
I've seen guys come along with more ability - they've been faster or bigger or stronger - but they never worked hard to develop themselves. Sometimes I've wondered what I could have done with their talent. On the other hand, the tag that I was too small and slow made me work hard.