If You are writing this story I think going on a popular or well-known writers site thing might be good(I know there are some out there just don't know any) or make your own site or blog thing and post it there. If you do post is on a blog site like Weebly or Wix or something then you probably would need to post a new chapter on a regular basis then. If you do make a blog or something then I likely read it. I really like the WN style books. examples of WN style books are:
So I'm a Spider
Rising of the Shield Hero
series where there is a forward-moving story yet never stays too long on any 1 arc or adventure or quest. I am still iffy on the whole Isekai AND Future thing. I think it is probably best to ditch the Isekai cuz the 5000+ yrs in the future is pretty much a new world (Earth 5000 yrs ago is not like Earth now heck even 100 yrs ago we have advanced so much). Whether you do the world is a dark age or the technology is so far advanced or a little bit of both where they have the tech but no one remembers how to use them I would like it.