I’d encourage any homesteader to take a Wilderness First Aid, or better yet a Wilderness First Responder course. These have paid for themselves many times over for me in reducing medical bills and having a better idea when affirmative care is needed. I also have met wonderful people in then, and they may well become part of your friend and community network, which would be another point of emphasis. Even as a relatively capable guy, I run into things on my homestead that are unsafe or inefficient to do alone all the time. Sometimes these are inherently frustrating, unpleasant jobs that are best done with someone who cannot divorce me so I do not want to ask my wife, who also has her own work to do. Trying to be helpful to my neighbors and community, including letting them know I could and would want to help if they get injured or ill, has paid off many times over as well.
I also endorse big dogs. My pyrenees-akbash has been the best partner in homesteading and food forest establishment I could ask for. He also comes to me and makes me feel better when he senses I am depressed, whereas a gun might end up being a permanent solution to a temporary problem.