Hi SOTC.
Yes, you can do it. Any suggestion that you can't do it is just your addictive voice, telling you lies. Taking action, as you suggest, is a good idea.
I feel for ya. My dad was diagnosed a month ago with cancer that has spread, no treatment is possible, and he is at home with hospice nurses coming in daily. So I do have empathy for what you're going through.
I am so glad I'm doing this sober ... although it's painful, with sobriety the pain kinda just moves through me - I feel it, then it passes. When I drank, I just ruminated over my difficult feelings and never really made progress, never got through it, never let go. It's better sober.
And I'm grateful to be able to take responsibility for my parents' care. No, I don't like what is happening, and I don't like some of what I have to do. But I'm able to be responsible toward them, able to make things easier for them, and to be loving and caring. That's worth everything to me right now.