There are quite a few of us on here who are older, we are just outnumbered. We are more likely to be retired, our bodies are not up to everything the younger ones are doing, and we hope we have gained a bit of wisdom along the way. But we are here.
Reading all the posts on the MMM website is a good idea, there is lots to learn there, no matter what your age. And the forums can be interesting/educational/exasperating - there are good posts and bad - so feel free to jump in, the water is fine!
