Makersplace also allows you to create your own NFTs but you have to register to become a listed artist on the platform beforehand.
How To Sell NFTs
To sell your NFTs on a marketplace, you’ll need to locate them in your collection, click on them and find the “sell” button. Clicking this will take you to a pricing page where you can define the conditions of the sale including whether to run an auction or sell at a fixed price.
Learn How to Create, Buy and Sell NFTs here.

NFT Books To Buy
The Ultimate Non Fungible Token (NFT) Guidebook: A Practical Guide to Everything NFT in Everyday Language