Online VB Game With Text And Connections?

Here is the plan/layout for the connection to a database.The biggest thing is that, it must be able to be connected by everyone, and it's pretty obvious why this is a big one, haha. The aim of the database is, naturally, to store all the info about the user required by the game (so each column would have x rows, name, age, etc etc). The program would have the ability to add columns (user registration) and log into them (username and password). They would enter their username password, and it would search for username, and if found, confirm password = password in that column.

So basically, the database acts like any other database, it just needs to be able to be connected by everyone (or by a vast majority of the average population), and be able to be edited (adding rows/deleting rows).I've dealt with databases before, but only local ones, and I've tried before with internet (and intranet a few times), but those ones never went anywhere, so they were dropped.