Welcome to the community, @Gardian1_2! This video (https://www.youtube.com/watch?v=SxVP2q7rntc) is quite useful, it has a lot of checkmates I came across when I first started out playing chess. Another thing which might help you (and I'm sure a lot of users here will say this) is completing a LOT of puzzles, either on Lichess or here on Chess.com. I suggest you dedicate some time to each part of the game - openings/opening theory, middle games, endgames and tactics. The progress won't be immediate but in the long run, puzzles help a lot!
Hope this helps and all the best with your future games
I just started playing chess.com a few days ago, and I had only played about 5 learning games years ago and I wanted to know if anyone could teach me some really good opening checkmates because all of the ones I know always get stopped very fast and I am trying to get more ELO because I am only 440 ELO.