At this point most definitely yes. The difference in leak rates is night and day.
Even if you did do a little mouth breathing leaking it's hugely less than the massive FFM leaks.
If you are seeing someone to help with masks tomorrow....see if they will show you the ResMed AirFit N30 nasal cushion mask.
It's silent like the P10 and uses same headgear as P10 but much more forgiving in the comfort department than the P10 is if you are having comfort issues with the P10. Plus it should be okay with facial hair as well.
I think it is worth trying. I think with your facial hair you should be putting more effort in a nasal sort of interface.
The N30 is essentially the P10 but without the nasal pillow part which can be uncomfortable for some people.
Super comfortable and even if it moves a little bit and leaks.....no where near what you are getting now for leaks with the FFM.