The problem with NFT's is that they are centered around a technology that a sizable portion of folks just don't fully understand. I see it as a way for people to support artists they like, with something that doesn't feel like a stack of cash. As the purchases are made with a digital currency that has huge fluctuations in value (trending upward) means the art itself isn't appreciating as much as the cash equivalent is going up.
There is a cost to 'mint' the art into a NFT. Like most things digital, there is a lot of fraud & theft that happens. Sports leagues like the NHL & NBA are active in it, as well as brands like Adidas. Some 'togs like JoeyL have done large sales of NFT's.
In order to make any money in it, you have to have a large social media following, be active in the existing NFT spaces & hope that folks will get out their virtual wallets for your items.
Before spending any money, dig a bit further into the virtual currencies, as that's what you'll need to accept & turn into a fiat currency like US Dollars. Check out
http://Coinbase.com - they are a larger player & have a learning section. Then look at the current NFT marketplaces, places like
http://opensea.io - see what's currently listed, and if what you offer would fit.
Do not put something up there you're not ok with the world stealing. I personally am not interested in NFT's, but good luck to those who are.