I'm no big fan of NFT's but my brother is so I've overheard him rambling about it before. I beleive OpenSea [https://opensea.io/] is the most trusted and popular market for NFT selling and buying right now. From the looks of it, it seems mildly easy for anyone to make an NFT there. I know my brother has and he isn't anything special really. So yeah, open sea should be good but mind you I'm no expert so take that with a grain of salt.