game improvement, I hope this reaches somebody out there in the void

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Tajh69
What else can I do to improve my play???! I’m new to chess, I suck too, but I’ve been having fun. Struggled in the beginning and got better, went through most of 350 to the high 400 winning most games, sometimes 8 or 9 games in a row, at times playing around 600-800 elo according to game review, but now that I’m 480ish range I feel like I’m getting worse and I can’t break 500. I’ll take any advice and please feel free look through my games, especially if you’ll help me get better cause I’m fuming.
tygxc

Blunder check before you move.
'Sit on your hands' - Tarrasch
Whenever you lose a game, stop playing and analyse it to learn from your mistakes.

Tajh69
I’ve never heard the term “Blunder check before you move” but I know sit on your hands, I play maybe a bit to fast, thank you for the advice tygxc, I’ll use it as I progress