Contributing to the core
One of the best things about Umbraco is that it's open source and you can contribute features and fixes. It's addictive; this is what it feels like to have your first contribution accepted:
Obviously, making a contribution is not only great for your dopamine levels but it is also great for the Umbraco project. There's plenty of things that the core team can use a little help on, making the project better for everyone.
Sebastiaan and Chriztian will tell you all about how you can contribute to the core of Umbraco, even if you don't have Visual Studio installed at all.
They will cover different ways to contribute, how to work with git and github, what if you have a merge conflict and many more topics.
There will be plenty of examples and Seb and Chriztian will inspire you to then join them in the hack room where they will be available for the rest of the afternoon to help you submit your first (and second, and third..) contribution.