Well, your opponent left a piece hanging and Qa5 doesn't take it.
You had the chance to trade pieces on e4 and then use your queen to fork two pieces (as shown).

Not winning a piece when you can is as much a blunder as leaving a piece of yours open to capture.
Fortunately, they kept giving you pieces, so you won.
Hello people! I have a rather straightforward question for y'all today.

I'm a novice learning and enjoying chess. I've been playing blitz lately since it gives me the opportunity to play between breaks at work.
I've played this game that I ended up winning. As always I look for the game review in order to learn what could I have done better, and I don't understand why Stockfish is telling me that that early Qa5 move was a blunder. Like a mistake, I could have supposed so, maybe because.. ya know, you shouldn't bring your queen out early or something. But blunders feels pretty harsh, and maybe I'm just missing something very big.
Can anyone of you help me? I'd love to improve