Hi Garwoodgirl and welcome to Team Estrogen!
Wow, you have a full plate! As far as motivation goes, here's some thoughts.
* Sign up on Bike Journal (www.bikejournal.com) and track your mileage. I dunno, I kind of like to enter in the miles I've ridden and watch it accrue. Also, you can help Team Estrogen achieve their mileage goal for the year.
* Watch the weight come off as you ride more and more, and feel stronger and peppier!
* Find some friends to ride with, or ride with your teenage sons. Set riding dates, and that way it's harder to "bail" on your ride for the day.
* You might find that riding helps you to "blow off steam" from your stressful days. Heck, that can be motivation enough!
* Check in here and let us know how you're doing.
There's lots of people here who have been in your shoes, and I'm sure they'll have some great advice for you.
Again, welcome to Team Estrogen!
-- Melissa