Twenty or so years ago someone asked a working photographer "what is required to be a professional photographer"?. His answer was one I never forgot, he replied "A working wife with a good salary". There are many outstanding photographers who go broke and there are many lousy shooters who drive a Mercedes. The difference is 'business'. Take any course or seminar in running a business that you can find, any business. Study promotion and marketing along with successful sales techniques and accounting. Learn to make a business plan and to stick to it. Having a business 'sense' is in some ways more important than photographic ability.
My own studio (retired!) handled commercial and illustrative (editorial) work, PR
and portraiture. Fortunately Atlanta is serious market for all of those, with many publications being based here, a large and relatively afluent population, as well as headquarters for many corporations. I don't know about your area or what area of photography you are targeting, but if you are considering commercial/editorial learn to cold call, learn to get past receptionists whose job is to keep you away from her boss. Without the ability to do low pressure sales, it just won't happen. Study a couple of book on sales by Zig Zeigler, there are excellent.
Learn the different forms of advertising. When I began, I spent way too much money on high quality advertising. I kept running into people who said "Oh I know who you are, I see your ads all over the place". But clients didn't come in. I learned later I was doing what is called corporate identity ads, my name became known, but no business. Later a and rep said Add "10% discount with theis ad", I built it and they came! That's the sort of subtle knowledge you will need. If you don't have that sort of knowledge, then hire someone who does.
If you are able to break even in a year, you will be doing well. It's more likely to take a good two years to see a profit. That takes up back to the working wife! It's a tough way to make a living, but it's also wonderful.