Just go and take the tests. I believe their are 12 general areas. Test Series - ASE

Obviously it's not a subsitute for experience, skill, or talent, but getting a few of those under your belt cannot hurt. Unless they changed the rules, you don't have to go to a tech school. Around 5 years ago, I was going to take a bunch of them and never followed through. There's enough practice tests floating around and it's not a killer amount of money.