Why is it necessary to know your painting buyers? Why is it necessary to understand how customer flows are organized towards your paintings? Why is it necessary to pay attention to and assign tags? Because money doesn't come from nowhere, from nothing. Usually, money before becoming yours belonged to someone, belonged to someone. And money always comes to us from people.
Please pay attention to my words. All this means that you somehow motivate other people to give you money. Think. What is there in your paintings that other people are willing to give you money for? What is there that your customers bring you money for?