Here you have a list of PHP + Python + JavaScript Open Source projects https://www.masterbranch.com/javascript-php-python-projects https://www.masterbranch.com/

Here you have a list of PHP + Python + JavaScript Open Source projects https://www.masterbranch.com/javascript-php-python-projects https://www.masterbranch.com/javascript-php-python-projects (Disclaimer: I'm the co-founder of the site). As others said, one way to start contributing is ask on the mailing list. Maybe you can start askin / answering some questions, being active and offering you to do some minor bugs or documentation (this is a good start). if you feel confortable and you have been doing a good job you will be able to continue with your contributions. Also, the most important part is: have fun, try to pick a cool project, something that you enjoy and start from there. Last but not less, good luck with that