Stuck in contributing

I would like to contribute to the project. I have read everything I found about this subject but I am stuck when I tried to git push my commit.
As you can see I have a local labelResize branch but I guess I should somehow create its remote pair. Which I failed to do so. Maybe I should create a PR from a fork?
Thank you,

For contributions please fork the project, make changes and then open a PR in the original repository.

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