Interesting game, thanks for sharing!
“Nothing is free in life”

I actually don’t know why that wasn’t brilliant

Also, if Qg6 after Bb5, then Nxc6+ fork, if Kd8 and you decide to take the rook, they play Qxe4 forking your rook and king, so you might think the material is equal, however the knight on a8 is trapped.

Actually, they don't. My first ever brilliant move was the 2nd best in the evaluation.

Actually, they don't. My first ever brilliant move was the 2nd best in the evaluation.
You are right.
Additionally, Bb5 is a poor move in this position. Pure "hope chess". Black should play Qg6 with double threat (c6 and Qxe4). White has nothing.
https://www.chess.com/game/121342146990
Tip for other beginners: If you see a knight near your king and a free bishop, do not take the bishop if it’s on the same color as your king!
Stockfish called my move an inaccuracy but at my level it’s a brilliant move.
Missed mate: