It's not lame at all!! Get excited!!
If you feel like you want to do 30 minutes twice a day - do it! But make sure you listen to your body. If you're really hurting, it's telling you to stop or slow down.
Also, make sure you're doing exercises you're not going to get bored with...that's how I find DVDs sometimes...doing the same routine / moves makes me either lose motivation or I tend not to work as hard.
My advice is, take advantage of the weather! After living in Scotland where it rained or snowed 90% of the time, I now enjoy being outside...go for a walk as well as your DVDs and enjoy our beautiful country!
Well done on your loss to date....you should be really proud!!