Health coverage after losing my job: marketplace or Medicaid? after 15 years as a machine operator

My employer coverage ended at the end of the month and I am trying to work out what to do as a machine operator. It has been weighing on me all week. I do not want a gap in coverage. How fast did coverage start?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.