My idea would be to first study in depth every hallucinogenic plant and mushroom that could have grown during the time period, as well as common tactics of char

My idea would be to first study in depth every hallucinogenic plant and mushroom that could have grown during the time period, as well as common tactics of charismatic public speaking. After traveling backwards I’d quickly gather up as many of those plants as possible and prepare them in ways that can be easily ingested by the common folk through teas and what not. Then I’d sell them to the common folk as ways to see and talk with the gods, and hope to gain a cult following. That way I can actually have people listen to me without disregarding me. Then I suppose I’d have to teach them how to build as complicated of a technology out of simple materials, maybe a simple plane like the wright brothers, and go on to teach complex mathematics or something. The first step is to just get people to listen to you. But I suppose that won’t help with your opening story haha