database for player accounts / Online Savedata

1.) I am making a game, when the player joins they will be prompted to create or login to an account. I want the accounts to be stored in a database, I have done some research and have seen SQLite but I have no idea how to use it, I like the way https://www.obvibase.com looks but I have no idea how to implement it into unity. I am not dead set on using a database so if there is a better solution I would appreciate it :)

2.) I also want to store data about the game like space ship positions online, I have some slight prior experience with save data on a client. So is there a good place I can store files online that all clients can access and read/write? I was thinking https://www.pastebin.com or google drive but I don't know how to use either of them, I also am discovering Unity.WebRequest but once again I don't know how to use it :/