There is a great book for you called "Together We Can" by Claire O'Rourke. Your mental health will be your greatest hurdle, so take it easy. Don't go it alone. Remember, you can and should depend on others. Share expenses by living together, share tools and resources, build a support group.
Your best option is to relocate, if you can, to where there will be jobs and supply chain security. We moved to New Zealand for that reason.
Also, hunting and fishing? Really? If it gets that bad there won't be anything to hunt and fish. Too much competition and previous resource depletion. Your garden will perish in a heat wave. Don't rely on anything outdoors.