You GO GIRL!! You ride your booty off!! I know how intimidating it is but you just have to say.....Screw it, "This is about me." and GO.....GO...GO...
I'm not a small (typical cyclist) build by no means!! I'm 5'8" 195 so I'm not small. You can do it and you will, since you have before. It's all new to me, so I'm so hooked it's scary....I wore shorts today, I haven't worn shorts in 5 years!!
I know it's hard getting started again, but you CAN do it, you WILL do it and you will love the results, you know that since you've riden before. Go for it and if you need anything I'm here!!!

Jenn