This base period covers 12 months and is divided into four consecutive quarters of three months each. The wages you were paid approximately 5 to 18 months before the disability claim begins are included in the base period (they must have been subject to the State Disability Insurance [SDI] tax). Your base period does not include wages paid at the time your disability begins.
Law school is three years long. If you go to an average law school and don't get any tuition help or scholarships, you are going to spend ~$150,000 all-in, at least. That's three years of tuition, assorted fees, books and living expenses.
Whether you plan on specializing in environmental law or family law, you can expect to spend at least seven years in school. If you intend to practice as a professional lawyer, you'll aim for a Juris Doctor (J.D.) degree.