You also should come in to set up an advising worksheet if you plan to enroll in a course limited to TPW students. Going full-time, and with approval from the TPW Director, you may be able to finish within one calendar year. That depends on your enrollment and residency status, as well as on the number of units you enroll per semester. Having at least a Bachelor's degree is pretty standard for professionals in the field. Not having one could hurt your long-term career prospects.
Processing takes several weeks.