To get started with Android/Lewa Revived OS, you'll need to get familiar with Repo and Version Control with Git.
To initialize your local repository using the Lewa Revived OS trees, use a command like this:
repo init -u https://github.com/Lewa-Revived-Project/android.git -b main-11.0
Then to sync up:
repo sync -c -j$(nproc --all) --force-sync --no-clone-bundle --no-tags
Then just
$ . build/envsetup.sh
$ lunch lewa_$device-< eng | userdebug | user >
$ mka bacon -jX