bought a variegated yucca, planted it in a bed that gets a lot of sun and has some sandy-ish, light soil. The tag that came with it says 'monitor and water until established.'

I know succulents don't like overwatering, but I don't want to kill it until it's 'established.'

How do I know when it's established? I know they're slow growing, do I necessarily want to keep watering it until I see growth?