Keep messaging bash: /bin/brew: no such file or directory on git bash by my mistake

i installed homebrew on my window git bash by mistake and it happen.
i try to fix it by re-install homebrew and try to remove it even even i removed gitbash and re-installed it but all of effort doesn’t work at all
i’m almost first time to use this tool so i am not good at it
i tried to fix it for a week but i cannot fix it so… may i ask if i can get some advise to fix it?