How can I boost my business page and earn a living from it?

I think you need to be careful about putting all of your sales efforts behind a single online page. It is very difficult to sell fine art products online. You should think about multiple channels for selling your products which can include exhibits, shows, and online aggregator sites that sell fine art products such as: https://fineartamerica.com/

If you want to drive traffic to your online page, then you will have to push a lot more content out online including the use of social media platforms such as Instagram and a highly optimized website. Once again, you have to push on multiple channels to pull in traffic and interest. Relying on a single online page to make all of your sales will most likely not work – you are competing with way too many people online who have a much bigger online footprint.