What kind of background would you need?
When I was looking for entry level people, I would look at folks in the electronics industry that had a basic understanding of that industry. I have taken people from assembly, manufacturing, etc. An understand of mechanical drafting also helped them. Today CAD systems are being used extensively, so CAD experience helps. Just an understanding of CAD systems in general helps. You can’t learn all the different systems out there but a general understanding of them comes in handy. Some companies, even though they have CAD systems, still layout the boards by hand. Getting your hands on different design manuals from different companies will help understand design. Many design manuals are very specific.