Como Descargar Play Store En Pc

Thanks for letting me know. I am looking at a SAMSUNG Galaxy Watch 4 with Wear OS to use a stand alone BG monitor I can get for $150. I assume the process requires installing a Wear OS version of Xdrip and an app to display the data? Do I still need an Android phone or computer to set it up or can it all be done via the watch?
Thanks for any help for this newbie!