I too was a cyclist...40 pounds ago!
Hey pale rider,
I'm getting back into riding after awhile out of the saddle. I found commuting difficult when I started, due, in part to the weight.
What I found most helpful was working on a trainer a bit. This allowed me to concentrate on my form and was very easy, despite the weather. Everything was easier (bike handling, dealing with clothes once at work) with a measure of fitness.
Remember to keep it pale...wear you sunscreen!