In this video, I was joined by Sebastiaan Janssen from Umbraco HQ so he could show us how to get set up with the Umbraco source code ready to contribute.
Here are some of the links from the video:
GitHub source code:
https://github.com/umbraco/Umbraco-CMS
Checkout v9/contrib
Guide to contributing:
https://github.com/umbraco/Umbraco-CM...
Download .NET 5 SDK
https://dotnet.microsoft.com/download...
GitHub for Desktop
https://desktop.github.com/
Register for Hacktoberfest
https://hacktoberfest.digitalocean.com/