Is it possible to create a database with all the owners of an NFT using Moralis? That would update the “owners” information if a nft is being transfer to a new owner, sold or burn.
You can get current owners and after that to track all the transfers with streams api in order to update the database
Is there a tutorial for that? I tried to solve using this streams api, but i don’t even know what is a Webhook URL rs 
You can follow a guide like this. You will need basic knowledge of Express - this server will be used to receive the webhooks from the Streams API.