Using Postman for Full Stack development and test

I am new to Postman. I have only now just been able to figure out how to make a POST and GET request. I am facing the task of creating a front end and back end full stack development and I am wanting to learn how Postman can help. Any suggestion or advice is appreciated.

I don’t know Postman in depth but I have a project to test a personal project API.
You may want to learn about environment variables, tests, organizing requests for instance.

Good luck.