I don't think you would have much impact. Even if we assume you are extremely good at learning new (i.e. old) languages, extremely popular (everything you suggest is done), and you have a rich benefactor who houses and feeds you, you are still lacking the giant supply chain stack that is absolutely required to get anything done in the modern world.
The only thing I could maybe get done is making some extremely bad and extremely expensive soap. Concrete or metals would be so far out of reach, I might as well work on a perpetual motion machine or try to transform lead to gold. Just go into the woods and try to mine some iron and you see what I mean.
The average modern person knows probably less about agriculture and building houses than the average person 12k years ago, and those are pretty intuitive.
The wheel isn't some complex contraption that needs to be improved over generations. It's probably the most simple tool imaginable, but it's also useless unless you have roads.
I'm always amazed how modern people have no idea how useless they would be just a few hundred years ago.