ohh nfts are like digital contracts and you can add a jpg or a mp4 to that.
you can create them on some sites and sell them. and collectors like to collect this original art pieces from artists.

here on hive you have nftshowroom : https://nftshowroom.com/
it costs 5 hive to mint here on hive

your style matches very well to hic et nunc, if you mint them there and promote them on twitter I'm sure you will have a lot of sales too, it costs cents to mint there (it uses tezos cryptocurrency)
https://hicetnunc.art/