Even if you went completely off the grid to live in the woods outside of the industrial civilization eating plants etc this wouldn't fix anything.
Yes, you would certainly reduce your emissions but this is not nearly enough.
Even if a miracle happened and we reached global zero emissions today there are already 415ppm in the atmosphere which will remain there for thousands of years.
Because of climate lag we are now only seeing the effects from the emissions from the 70s and early 80s. Even in 30-40 years when we can see the effects from our current emissions it will not stop there. There are many self sustaining climatic systems that will have been triggered and will continue to change the climate.
Humanity needs to invest all possible resources into clean energy and carbon sequestration. If we don't go all in during the next decade we are done.