Of course, you do not need to understand any work of Python to help improving robotframework-drupallibrary. You just need to know how to write RobotFramework test cases and test suites that leverage its keywords.
File tickets to the Issue tracker to :
I’m an experienced Python developer but some kind of noob - at the moment - in the development for RobotFramework. So...
If you want to improve this package too, consider forking this project, install your fork adapting the Developer installation guide.
Of course, your pull request is welcome. Just take some time to file a ticket that explains it.