To get an overview of the project, read the README. Here are some resources to help you get started with open source contributions:
- Finding ways to contribute to open source on GitHub
- Set up Git
- GitHub flow
- Collaborating with pull requests
This project uses version 2 of AutoHotkey. You can download it here AutoHotkey Download Page
When looking through the AHK docs its important to make sure you're looking at the v2 docs: https://lexikos.github.io/v2/docs/AutoHotkey.htm
You should also be using some kind of formatter, like AutoHotkey v2 Language Support