To get started with Android, you'll need to get familiar with Git and Repo.
To initialize your local repository using the Reloaded trees, use a command like this:
repo init -u https://github.com/ReloadedOS/android_manifest.git -b q
Then to sync up:
repo sync -j$( nproc --all ) --force-sync -c --no-clone-bundle --no-tags --optimized-fetch --prune
The source at ReloadedOS is well configured for building.
$ . build/envsetup.sh
$ lunch reloaded_device-userdebug
$ make reloaded -jX
where X is the number of jobs you would like to allot to the build system.