C.M.
when I was just out of high school I decided to be a preschool teacher. All I had to do was get my 12 ECE units (got it done in less than a year going part time at the community college). That's it! Super easy and quick. I taught preschool for 5 years up until my daughter was born. I'm now living in VA (was in CA before) and they do seem a little more strict here. I'm working at a montessori school as an aide and if I wanted to be a montessori teacher, then I would have to go through montessori training and I just don't have time now with 2 kids.
Just call some schools around and see what they require to be a teacher. Some do not require any units and you only need to be CPR and first aide trained.