If you feel like you can help people out, go for it! I'm not sure about amateur rules and what not, but I'm sure there's a way to dabble in giving lessons to see if it's what you really want. I am a high school coach. I've coached three different sports in my career, two of which I have never played. While I did play football through high school, I wasn't a very good player. However, I am a good football coach and I'm a pretty good soccer coach too. Just because I'm not a great athlete, doesn't mean I can't teach some one else. Doesn't the old saying follow: "Those who can't do, teach." So if you want to teach people, do it. If you're not any good, they'll quit paying you. If you are good, they'll keep paying you. I don't really even see the issue.