Kimberly - Hi there!
We have several forums you might want to look at. First, we have a support thread for people doing the C 2 5k in the Exercise forum. Second, we have groups by age range, and you might look at the 40-somethings for support from others near your age. And you also might want to look at the Featherweights, for those starting relatively close to their goal weights. Any or all would be wonderful places to jump in.
There are a ton of people here ready to give you support, so jump on in, get to posting, and keep going. Can't wait to get to know you better!