How do I grow a spine?

You know when people say “Americans aren’t angry enough”? I am coming to the realization that I am that American.
“But my job” “my bills” “I have plans”
While realistically I cat completely quit my job and give up on it, I need to get better at prioritizing fighting back and being another body at protests. However, I am scared shitless of the real consequences of putting my body on the line. Does anyone have advice for getting over that or working past it?