I work in an EC as a Unit Sec'y... my manager told me that after I finish my first med/surg rotation, I can work as an EC tech.
I know that in this hospital, and in the hospital I worked at previously, they require EMT training to become an EC tech. And they are paid decently - I make $17/hr as a sec'y, and techs are a paygrade higher than me. I can't wait to become a tech, because the learning experience will be invaluable - I'll be drawing blood, starting IVs, inserting foleys, and more. After I graduate from the program, then I'll be a GN until I pass the boards.. and then I can be an RN here. That's my route to becoming an EC nurse :-)
(But every hospital is different...)
If I were you, I would look into being a volunteer (if you can afford to) - we always appreciate our volunteers, and it really is a good way to get your foot in the door. Or... another job that requires no experience that we have here is a transporter - taking patients to xray, CT, their inpt rooms, etc. The unit sec'y route is good, although the job also requires training in most places.
Or - get any job that you can in the hospital to get your foot in the door, and work your way to the EC.
Ask around - do you have any friends/family that work in a hospital that can help you get in?
Good luck! (you're going to love it!)