Just follow this link : https://flutter.dev/docs/get-started/install
And follow each and every step
C:src>git clone https://github.com/flutter/flutter.git -b stable
git clone https://github.com/flutter/flutter.git -b stable
C:src>git clone https://github.com/flutter/flutter.git -b stable
$ flutter sdk-path
sudo softwareupdate --install-rosetta --agree-to-license
Operating System Windows 7 or Later (I am Windows 10. You can also use Mac or Linux OS.).
Disk Space 400 MB (It does not include disk space for IDE/tools).
Tools
1. Windows PowerShell
2. Git for Windows 2.x (Here, Use Git from Windows Command Prompt option).
SDK Flutter SDK for Windows
IDE Android Studio (Official)