Basically the title, you need to use the skills you have now and be a productive member of society.
I don’t mean go back and show the wheel or try invent germ theory etc.
For example I’m a mechanic i think I could go back to the late 1800s and still fix and repair engines and steam engines.
Maybe even take that knowledge further back and work on the first industrial machines in the late 1700s but that’s about it.
Bring in 5 guys and you can be their boss, then those guys each need to bring in 5 more guys, they can be bosses of those guys, you get to be the big boss…wait wait wait, the king is just gonna go grab some outlanders, maybe a cow or two.
Hey it you throw all the waste in the river it just goes d I wn the river… Take that Information as you want