How would I go about finding a doctor of a certain specialty around my area? I need to find a doctor specializing in cardiology. Where do i go? Is there a place where there is a list? and are other people experiencing this problem?

You need a family physician or a general practitioner to tell you which doctor and whom to see for a particular illness except you have a diagnosis to work with. Where exactly are you if I can't be of help.

Im in festac area. Is there a service i can use or something? Im sure that im not the only one who has had this issue. How do i know that the family practitioner is a good one?

From your discussion
From other practitioners(inquiry, referral or recommendations)
From the internet
Hospital visits
These are some of the ways to know the competence of the person you are dealing with.

I just opened a topic for this same issue and I feel it's quite important.