You seem to be asking a lot of questions about a lot of things maybe asking one question at time would probably help, even though they are not related.
Anyway there isnt really much to do. Im going to assume your using a Database if your not you should think about it otherwise its going to be a tough ask.
My guess would have at least 2 tables.
Teams
Games
Now games would have home and away or team1 team2 these or whatever fields they are should be foreign keys for the teams id in the teams table. For this to work you only need to have the games, score opponent and whatever else. The Teams table should have the Goals, Pts, GD etc.
Now Im going to stop there and hope that at leasts gives you some insight, as Im not going to code this for you and no one will they will give advice and help when you have something more solid.