It can be done. Success depends on factors like the quality of your writing, your marketing skills, and the demand for the kind of stories you write. If you can consistently produce compelling short stories and get them in front of the right audience, you have a chance at turning it into a career.
Sure. But it's not easy. To make a career out of selling short stories, you need to be really good at writing, have a knack for finding the right publishers or platforms, and build a fan base over time.
Yes, it's possible. Some authors have managed to make a living by selling their short stories, especially if they have a unique style and can find the right markets.