It depends on the situation in your city. In big cities, small beauty salons are definitely more difficult. The land price is expensive and the cost is high, but there are also many people. Generally, beauty salons above medium-sized cities can make money, and small ones have to find their own way. On the contrary, smaller city beauty salons are often more popular, because women in small cities pay less attention to the brand of beauty salons and are more practical. As long as the products are good, the technology is good and the service is considerate, it can still be done.
In addition: opening a beauty salon may have to face many quarrels, so be mentally prepared.
Of course, professional knowledge is essential, even if you don't do beauty for customers, you should know it so that you won't be cheated.