Some very good answers, and the variety, from MWCs and Dad's to contract jobs, to craft fairs and websites. I think the market to get hired as a photographer is very slim to none and the competition is well over saturated for the market.
In 1969 or so, I was taking a photo course and reading the stock photo books, and suppliers magazines. I asked the head instructor who said, newspapers and magazines are laying off staff, you don't really want to become a professional photographer. Well I didn't anyway, something "really good" came up, instead.
As a comparison, I did some volunteer work for a museum and said it was interesting how the archeologists had interesting work beyond just teaching. The head of the rescue group who also taught and was very highly regarded in the state said, "you could shoot ever employed archaeologist in the country and the next graduating class would fill all the available positions."
I think photography is even a tougher endeavor to find a good paying position.
Some people do make money and some make a living, and some people live from Youtube views. I suppose some people make their living from stock photos. But the answer is, most don't and most never will. I know I don't actually make a profit, but it's nice to have the Schedule C and deductions and I claim every penny I make, and also depreciate equipment and on rare assignments take travel and lodging expenses to file. How that still shows as a profit and income that's taxable, is beyond me, but I'm happy.
So along with, start with a business plan, and planning and understanding the market someone chooses for their profession, there also is a need to keep good records, starting before day one, cost of starting out, accounting of income and expenses. If someone wants the job and the income and a self supporting business, there are licenses and details to consider.
I'll never say, don't do it, but I will say, investigate and be realistic about how much someone can earn from being some sort of photographer. I suppose it's possible to start part time and try to break in?
Last I read fashion is highly competitive and doesn't pay well, because there are too many people who want to do that. I'd say the same for food photos and shooting models. The most attractive markets, draw the most people trying to work them, more competition drives down prices. If the idea is to be famous and do something high profile, the climb up is steeper and has more obstacles. Room at the top is very small.