Walking is an excellent idea. I agree with you about getting out and getting about.
When the weather doesn't cooperate with your plans, check out your local indoor shopping malls. They open our mall doors at 8:00 a.m. even though stores don't open til much later.
I walked the malls one winter and thoroughly enjoyed myself -- even though I was probably 20 years younger than the majority of the folks there. I met some really nice folks, and a lot of them were walking for therapy for knee replacements or hip replacements, some walked a very fast pace, so just were "window shopping", and it was amazing how many of them knew each other. It would be a good excuse to get out a few times a week first thing in the morning to get your day started. I've even participated in their Tai Chi class held right at the mall - again, I was the youngest one attending at the time... most people my age were working full time jobs during the day. Loved Tai Chi!