How to contribute to a software development on Git?

e.g.

1. Log in to GitHub, and on this project's page, click "Fork" to your own repository.
2. Clone your repository to your local machine: 

$ git clone https://github.com/xxx/Ansible-VIM-IDE.git

3. Add the original repository as the upstream branch on the master branch: 

$ git remote add upstream https://github.com/Hello-Linux/Ansible-VIM-IDE.git

4. Create a new development branch locally: 

$ git checkout -b dev

5. Make code changes and commit on the development branch: 

$ git add .

$ git commit -am 'xx change description'

6. Switch to the master branch and synchronize with the original repository: 

$ git checkout master

$ git pull upstream master

7. Switch to the dev branch, merge the local master branch (which is now synced with the original repository), resolving any conflicts if needed: 

$ git checkout dev

$ git merge master

8. Push the local dev branch to your remote dev repository: 

$ git push origin dev

9. On your GitHub repository page, click "Compare & pull request" to send a pull request to the original repository.

10. Wait for the original author's response (accept/reject).