What natural remedies help MAC to not worsten (as quickly).

I have recently been diagnosed with MAC but have very few symptoms - weariness and some congestion. I wake up eager for the day after a good night's sleep (9hours) but by afternoon I fizzle out. I use a PEP apparatus, saline nebulizer, sinus rinses, and a daily inhaler. Are there other natural remedies I should start/include. I'm 85 years old and have had asthma since my teens. I've lived a very active life. My spinal scoliosis/stenosis has limited my mobility these days to my sorrow.
Thanks for listening.