STgirl brought up a good point. To work as a surgical assistant in California, you generally need to be a Physician Assistant or a Certified Registered Nurse First Assistant (CRNFA).
To become a Physician Assistant, you'll need to first complete a bachelor's degree which takes about 4 years of college. It doesn't matter what your major is, but most PA's majored in biology. After you finish your Bachelor's degree, you can apply to a Physician Assistant program which takes 2 more years of school and is very intense. PA programs are also fairly competitive. Most students have an A average in college. This process will take 6 years, although there are some programs that will let you do a bachelor's and PA degree combined in 5 years.
To become a CRNFA, you'll first need to earn a Bachelors degree in nursing and become a registered nurse. After that, you'll have to secure a job in the OR for at least a year. From there, you can be approved to take a course that will teach you how to assist in surgery. Then after working as a nurse surgical assistant for a considerable number of months, you can get certified. This process can also takes about 6 years.
A surgical technology is a bit different from a surgical assisting, but you can complete an ST course after finishing your GED by going to a vocational school. Then you can work in the OR and see if you really like it. If you decide to do this, try to do an ST program that also has an option that allows you to transfer your credits towards and associate or bachelor's degree.