Posting on Facebook to collect likes is not selling art.
Posting about whatever you create on Hive is not selling art either. You get some upvotes, but some are autovotes, others are just voting to get curation rewards, but that doesn't mean selling art.
Selling art means you upload an image of your physical or digital creation and someone pays to own it.
I created that page to sell my art and not to collect likes. But nothing good came out of it.
Have you tried the NFT showroom on Hive? Although I suppose someone would have contacted you if they would be interested in buying your drawings.
I do have an account in NFT showroom. But I only sold 1 NFT(It was also my first NFT).
Unfortunately this is how it is. You can't force people to like or buy art. Every artist has faced this and only a selected few make it. Most of them are just dreaming about becoming successful one day.