Hey there!
Lots of folks here are over 40.
This is a place to find information and ideas, as well as support from others who are on the path of weightloss. Browse around and see what you find! And feel free to post any questions you have in the forums. As you'll see, we have many forums! There are over 40 and over 50 forums you might want to check out, as well as Support forums and Diet Central for different plans.
Good luck to you on your journey!
Jay