Should I walk to work ?

There are no buses running at the hours i work, ans It would take me approximately 45-50 minutes to walk to work and then I'd do it again back home. So all together I'd be walking almost 2 hours a day. My job is a desk job so all I do is sit for 9 hours. So the excercise would be good. I'm going to invest in a bike soon btw. But do u think Im2 hours a day is alot of walking and could cause me muscle pain etc. I'm not overwrite btw