Congrats on the new wheels!
Back in the day I was training for AIDS Lifecycle (7 days, 540 miles) Velogirl, a TE'er told me that cycling is all about strength to weight ratio. She explained "You can get stronger, you can get lighter or you can do both." At the time I was about 190 at 4'11. I stayed about the same weight but got much stronger. The inches dropped off, kept having to get smaller clothes but as I rode the pounds were about the same.
I've now dropped about 20-30 lbs, I'm not sure. Went from size 18 jeans to 12s and those are getting loose. Anyways all this is to say you can get faster, stronger, better at any weight. if you ride the weight loss will come but you can be faster now by getting stronger.
Enjoy the new bike!