You are using a mesophilic culture. That's what buttermilk is. It will age out like any normal cheese. Start taking samples for tasting at 45 days with a trier. If you don't have a trier, age for 60-90 days before cutting, then if you like it, eat it, if not, rewax and age some more.
One month is not long enough for any hard cheese. It will have weak taste