how the hell does chess work

I just started getting interested in chess, and I'm so confused. here are my questions:

*HOW* do you checkmate? what are all the ways you can checkmate?

Whats with all the names for things? "reti opening" "englund gambit" "Castlemania" I dont get it and I cant keep up when I watch videos about it

yeah basically, if anyone could please explain, that would be nice. I'm starting to feel bad about myself because I cant understand this lolll ill just practice and maybe ill understand more!

" Checkmate happens when you put the opponent’s king in a position where it is under attack (in "check") and there is no legal move they can make to escape the attack. Theres many ways to checkmate someone:

1. Back Rank Mate: The opponent’s king is trapped on the back rank (the row closest to them) and cannot move because it's blocked by its own pieces.

2. Smothered Mate: The king is surrounded by its own pieces and can’t move, while a knight delivers the final blow.

3. Fool’s Mate: The fastest possible checkmate, which occurs in just two moves if the opponent makes poor moves (usually with f2 and g4).

4. Queen and King vs King: The checkmating side uses a queen and a king to corner the opponent’s lone king.

5. Rook and King vs King: Similar to the queen and king method but with a rook instead of a queen.

6. Back Rank Mate: The king is trapped on the back rank with no pieces to escape, and a rook or queen delivers a checkmate.

Chess Openings:

• Reti Opening: A chess opening strategy where White starts with 1. Nf3 and later aims for flexible pawn structures.

• Englund Gambit: A chess opening where Black offers a pawn in exchange for quick development.

• Castles: The move involving both the king and a rook. It’s a defensive strategy to safeguard the king and develop the rook.

Haha that's a basic question a checkmate is the ending of a game when the king can't move anymore which means he's trapped!

Improving Your Chess - Resources for Beginners and Beyond.....

https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

4 move chess

When you're threatening the King with a piece, but it can't move anywhere or block the attack, then you win.

Doing puzzles will help you learn different ways to checkmate.

Tempo is most important. My own understanding of it is pretty rudimentary, but for instance if a knight is forking two rooks (threatening two rooks at the same time) and one of those rooks can move to put their King in check, then they are forced to move their King, which gives you the opportunity next move to move your other rook. So you don't have to choose which rook to give up. You can save both. This is a tactic that takes advantage of your opponent losing a tempo.

Because there are only so many good moves, openings are a way of remembering a set of best moves, based on what the other player is most likely to do. To memorize an opening, you memorize the various "lines", i.e. the various choices the other player can make. You could theoretically memorize up to thirty or so moves reliably on some of these openings, but that would take a long time.