How can I get an office job after 17 years at home?

I've done a few odd and end jobs but basically have been home (SAHM) for 17 years. I have applied for office jobs but now they are all looking for Excel or Word or some other kind of expertise but not the same for all jobs. I feel like I was just thawed from a deep freeze! Any suggestions on how I can become more computer savy to an employer regardless of what programs they work with?