NFT digital art creator

Hi, I'm a digital art creator. I've been creating art for several years but I don't understand why I'm not successful in selling my collections, some of which I had to spend my savings to be able to pay for the gas to put them up for sale on other platforms and uploaded them for free but without having success I don't understand the world of art many times I wonder really my works are not really good enough for someone to notice them to be able to sell them that's why I'm here if someone could give me an opinion I would appreciate it in advance thank you very much blessings