After restarting terminal, Brew commands not working and getting some error in terminal

I have macOS Monterey(v12.3) and had installed brew with exact guidelines shown in youtube videos. But brew commands work only if I run in the same terminal session. When I restart the terminal and try to run the brew command it shows the following error: zsh: command not found: brew I have tried to install the brew multiple time but every time same thing happens. I am new to MacOS. Please help.