Analysis...
A slightly odd game with swings back and forth... you had a very nice tactic 14.Nxd3+ 15.Kd1 Ba4+! 16.Qxa4 (forced) Nb2+ winning the queen. Later you were clearly winning but 27.Qxd3 was a mistake, just Bxd3 by white would have made it a contest again (Nxb4 is not possible because your knight is pinned to your king by the Rc2).
Check out this #chess game: eshanjoshi1 vs Dis1510 - https://chess.com/live/game/5508240842
Interesting... 4.Bxf3 is a mistake because white has 5.Nxd5 Bxd1 6.Nxc7+ winning an exchange. Your opponent missed it, then later blundered his bishop for no particular reason and you were winning easily. 19.Nxf3 would have been crushing, winning a pawn and one of the white rooks, attacking Rg1 and threatening Nd2+ winning the Rf1. You got into a bit of a tangle with your 3 pieces in whites camp and ended up losing the advantage though, better to just bring your sleeping Rh8 into the game than hunting more pawns. Anyway, your opponent missed your plan to win his bishop and it was game over again. When you are winning try not to get too caught up in plans to win even more material - this can allow counterplay. Often the best way is to play simply, bring all your pieces into the game. Who cares about winning a pawn when you are already up material? Bring all your pieces into the game and the opponent will not be able to deal with all your threats.
[Event "Dis1510 vs. paimon4"]
[Site "Chess.com"]
[Date "2020-09-29"]
[White "Dis1510"]
[Black "paimon4"]
[Result "1-0"]
[WhiteElo "876"]
[BlackElo "935"]
[TimeControl "blitz"]
[Termination "Dis1510 won by checkmate"]
1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Bg5 Be7 7. Bxf6 Bxf6 8. O-O-O+ Ke7 9. Nb5 Bd7 10. Nxc7 Bg5+ 11. Kb1 Bg4 12. f3 Nc6 13. Nxa8 Rxa8 14. fxg4 Nd4 15. Nf3 Rd8 16. Nxg5 Rc8 17. Nxh7 Rxc2 18. Bd3 Rxg2 19. Rc1 Nf3 20. Rc7+ Kd6 21. Rxf7 Nd2+ 22. Kc1 Kc5 23. Rc7+ Kd4 24. Kc2 Ke3 25. Rxg7 Nc4+ 26. Kc3 Nxb2 27. Rxb7 Nxd3 28. Rxa7 Rxg4 29. Ra1 Rxe4 30. Nf6 Rf4 31. Rf7 Nc5 32. Nd5+ Ke4 33. Nxf4 exf4 34. Kc4 Nd3 35. a4 f3 36. a5 f2 37. a6 Ke3 38. a7 Nb2+ 39. Kc3 Nd3 40. a8=Q Ke2 41. Qe4# 1-0
OK last one as I'm putting a little effort in to give advice and your responses are monosyllabic... This was an easy win and you were never in trouble as your opponent blundered in the opening. However, 9.Nd5+ was considerably stronger than 9.Nb5. After your move black can go Na6 defending the c7 square and he is ok. Nd5+ forces a king move but where to go? Black cannot go Kd8 or Kd7 defending c7 because then there is Nxf6+ (discovered check from the Rd1) and you win a whole free bishop. Any other move and you can still play Nc7 winning the Ra8. Some general advice... You are playing 3 minute games, this is not long enough to think properly and analyse your moves. You are not a strong player, and the way to become stronger is to play longer games, think carefully, analyse, examine your mistakes after the game. Additionally, if you want to improve by taking advice in the forums it is better to post losses. As I have shown, in these 3 games you have posted you have made mistakes but it wasn't a problem because your opponents are weak and didn't exploit them. Basically you got away with it, but if you wish to go from 800's to 1200's you have to cut these mistakes out. Better players will not let you off the hook.
ok... i won't post more analysis...
I am posting analysis, not you... What I'm saying is if you want to improve then do your own analysis (because doing this will help you improve). Then post in the forums your game (preferably a loss as you need to understand why you are losing) along with your analysis. Stronger players can then see how you are thinking and give advice. Here though you post 3 blitz games, all wins, all full of mistakes from both players, no analysis, no indication of what you were thinking (which you probably weren't doing because they're 3 minute games). I can say this move was stronger here, or that was a mistake etc but it doesn't mean anything without your own input.
[Event "gonzalolopez1948 vs. Dis1510"]
[Site "Chess.com"]
[Date "2020-09-28"]
[White "gonzalolopez1948"]
[Black "Dis1510"]
[Result "0-1"]
[WhiteElo "809"]
[BlackElo "889"]
[TimeControl "blitz"]
[Termination "Dis1510 won by checkmate"]
1. e4 d5 2. Nc3 dxe4 3. Nxe4 Nf6 4. Nxf6+ exf6 5. Ne2 Qe7 6. d3 Bg4 7. f3 Bd7 8. Bd2 Nc6 9. a3 g6 10. g4 f5 11. g5 Bg7 12. c3 O-O-O 13. Qa4 Ne5 14. Qxa7 Nc6 15. Qa8+ Nb8 16. O-O-O Bc6 17. Nd4 Qd6 18. Qa5 b6 19. Qb4 Qd7 20. c4 Bxd4 21. c5 Bxf3 22. Re1 Bxh1 23. cxb6 cxb6 24. Bf4 Bf2 25. Rd1 Bf3 26. Rd2 Nc6 27. Rc2 Qxd3 28. Rxc6+ Kb7 29. Rc3 Qd1# 0-1