How to play endgame better?

I have been playing chess for 1 year and have grasped the basics and a little advanced. But my biggest weakness is END CHESS. The matches I won were all due to wise moves in the opening and middle game, punishing my opponent's bad moves. But if the opponent doesn't make any mistakes throughout the match, the game changes to the end game... then I lose. There were also times when I had more troops but still lost. For example, I have 3 pawns, 1 knight and still lose to 1 pawn and 1 knight... or are tied. If you have good endgame experience, can you share your secrets with me? ................ *Aside: I'm not good at English, so I translated this article using Google Translate. If there are errors in words or spelling, I hope you understand.

Follow two principles:

1. Push your passed pawns
2. Attack opponent's weak pawns

Chess should be studied backwards: first endgames, then middle games, last openings.
The opening is to prepare the middle game; the middle game is to prepare the endgame.

Get a good book.

Most people find Silman’s Complete Endgame Course useful.

I’ve benefitted from Pandolfini’s Endgame Course, Dvoretsky’s Endgame Manual, and dipping into many of the almost 60 endgame books on my shelves.

I don't want to say something stupid, but in my opinion, to learn to play endgames well, we absolutely need to play long games. Even playing 15'10" I very often reach the endgame with little time available, while this phase lasts much longer than the middle game and requires a lot of calculation and very precise play ( right ? ) ; so I always feel like I’m missing the chance to really learning how to play endgames.