To get started with Android/los-kenzo, you'll need to get familiar with Git and Repo.
To initialize your local repository using the LineageOS trees, use a command like this:
repo init -u https://github.com/los-kenzo/android.git -b lk-7.1
Then to sync up:
repo sync
Please see the LineageOS Wiki for building instructions.
For more information on this Github Organization and how it is structured, please read the wiki article