I don't know about your part of the world, but in Australia you may find a good GP (doctor who is a general practitioner) who can handle the medication process with you, or see a psychiatrist who usually has more expertise in this area.
Either way it can be a bit of a trial and error process until you find what works for you (which may be different than what works for me or others). Usually four to six weeks before medication reaches full effectiveness. If the medical professional writes you out a prescription without organising a follow up to see how well it is working, tear up the script and find another doc. Don't stop a medication cold turkey. Ramp down dosage under medical guidance.
In my early fifties now and pretty sure I'd be dead by now if I hadn't.