From the Android studio File and Create new Flutter Project like below
Then select flutter application like below
Then click on next and give Project name
Note: Project name all small letter and apart from underscore it cant take any other special symbols.
In case flutter SDK and Android both are in different then you choose Flutter SDK
Then choose project location and description is optional
Then click on next and provide company Domain name with this name only your package name can create. if you want you can change package name and click on submit.
Then it can take 2-5 Min to create project the select Project on left side in Project panel start write the code on main.dart file
Simple program here with below code
Then Create Emulator or Connect real Device and run your application