You should wait till it's healthy. It looks better than it did last time I saw it, but.... idk man, I'm not even sure where you would take a clone from. Maybe the top, but, I probably wouldn't.
You can cut a clone off that whenever you want. While you should wait until the plant is MUCH healthier, but my average height on clones is about 2" and I have zero problems if you provide the right environment.