help can't win
It takes a long time to get good at chess, so don't worry about a handful of games.
Opening principals
https://www.chess.com/article/view/the-principles-of-the-opening
Tactic stuff
(it's a little too comprehensive for a new player, but look up pin, fork, discovered check, and removing the defender)
https://www.chess.com/article/view/chess-tactics--definitions-and-examples
The list @imbacon has often posted has a lot of useful tips
Opening Principles:
1. Control the center squares – d4-e4-d5-e5
2. Develop your minor pieces toward the center – piece activity is the key
3. Castle
4. Connect your rooks
Tactics...tactics...tactics...
Pre Move Checklist:
1. Make sure all your pieces are safe.
2. Look for forcing move: Checks, captures, threats. You want to look at ALL forcing moves (even the bad ones) this will force you look at, and see the entire board.
3. If there are no forcing moves, you then want to remove any of your opponent’s pieces from your side of the board.
4. If your opponent doesn’t have any of his pieces on your side of the board, then you want to improve the position of your least active piece.
5. After each move by your opponent, ask yourself: "What is my opponent trying to do?"