Hello,
You can try 0.5.0 right now, on the github dev branch.
Download the latest version here: https://github.com/kyranf/robotarmyfactorio/archive/refs/heads/Unstable.zip
and put it into a folder called robotarmy_0.5.0 in your factorio mods folder, and select that version in your mods list in the game. Make a copy of any save that you continue from, and expect to need to re-build any Robot Assemblers and re-deploy all your droids, to ensure they use the new code.
A new game is easier, but if you just want to try it out you can add it to an existing save. Just make sure you back up your old one/rename the new one!