My first thought is give yourself like, a week or two to adjust. It's a huge change getting into plant/manufacturing work for most people and until you've experienced enough to understand 'normal' it can feel like you're constantly being bombarded with new surprises. For me at least, the worst part of a job is often not knowing what's coming or what's expected of me, which usually gets better with time. There is always gonna be alienation and frustration unfortunately, but I find that if I'm able to take care of myself physically and create routines that let me see people I care about and get quality time in I can manage.

For the larger existential worry, the good news about a mass movement is that none of us needs to carry it on our back. We're stronger together, and not everyone will be sweating it out in a bog like Che, nor should everyone be expected to. Maybe that's not the most helpful thought but it helps me when I get down.