How can I create an email signature - my company's logo, plus my contact info - as a .jpg document?

I’ve made a small, Word version of my logo. It’s easy to copy/paste that logo into an email message. But, I want to add my address and phone numbers and save everything to a single document.

Yes, I’m lame with technology. I still use a film camera (I really do), so even .jpg is complicated for me.