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What she need to learn is make up, nail art, hair cut, decoration, photography etc skills that other people sell too high and you can sell for cheaper price.
You're right. In other words, she needs to master a skill in the service sector, rather than engage in artisanal production of any product such as bread, soap, and clothing. Although in a few years, humanoid robots will probably appear that will displace people from the service sector...
It is better one learn one skill and master it very well than learning different skill and not even mastering anyone, it is only when you master a skill that you can make money from it, some people are too in a hurry to make money and they decide to learn any skill they notice is paying and from there they end up learning a lot of skills and not even making money from them and they are not even a master to any of the skill they learnt.
One cannot disagree with this. It's better to be a master in one profession than an amateur in several professions (and that's exactly what happens if you grab onto everything).