Even with only 191 Stamina, you can still clear 480 Stamina a day (1 stamina back every 3 minutes or 20 per hour) as long as you log in every nine hours in your case.

The higher stamina helps when you level up (refill) and if you have been away for longer than your refill takes (nine and a half hours in your case).

So get some levels, but don't worry too much about your stamina being low.