Reading, modifying and displaying a database in a ranking project

Registration date
Friday November 12, 2021
Last seen
November 12, 2021
Hello everyone,
I'm currently trying to develop a website with Wix to create a ranking system for Beer-Pong student players inside a school.
Creating a match, the player has to write other player's mail address, as long as they are registered in the database "Players" I created on Wix. (I don't know how to check if the mail adress is well registered)
I don't know how to "associate" what a player wrote to a specific element in the database. Like the player writes "" for player 1, and then the element "Jack Hopper" with his mail, school year, number of games played etc. is supposed to be selected
Then, when the match is finished, they'll have to write who won. At this moment, by indicating the score for each team, the site will have to modify the numbers of game played, won and lost for each player who participated.
Having skills in Python, Java and a bit in HMTL, CSS but no real experience in Javascript, could someone help me please?