Hi stacy,
You can go to any GP. First visit, he will take your blood pressure, find out if your menses is regular, ask you a little bit of your medical history such as drug allergy etc and he will also find out about your lifestyle, e.g. smoker, whether you drink etc etc.
Then he will recommend you the pill and teach you how to take it. Usually have to take the pill for 21 days then stop for 7 days then continue again, then stop again, then continue....the cycle goes on. Subsequent visits you can buy off the counter as they have your records, so don't have to keep consulting doctor. But once a year have to go for pap smear.
If you intend to get pregnant, doctor will advise you to stop pill and wait for 3 menses cycle before you attempt to get pregnant.
Hope the info helps.