I understand your helpless feeling. My mom was also diagnosed with lung cancer decades ago (I was diagnosed with lung cancer 22.5 years ago). May I suggest joining a virtual support group with other caretakers? The connection should give you much needed information and emotional support. I am attaching a link below if you would like to register. Please know that this community is here for you both, please reach out anytime. With warm hugs, Alisa, Lung Cancer Team Patient Leader
https://www.lungevity.org/for-patients-caregivers/support-services/virtual-meetups (scroll down the page for the "Caregivers" section.