Interesting thought experiment.
Like most, I think our ability to introduce new technologies would be severely limited. While there may be a few “Basic” technological improvements any of us could introduce, the need for other people to not only help build but to convince others could take a lifetime.
Back in the late 1980’s or early 1990’s, there was a TV series called “Connections”. The original series, hosted by James Burke. He did an extraordinary job showing how many or most of our technological advancements have been the result of years and years of smaller achievements attained by many others. Burke, basically reverse engineered the “Knowledge” required and traced it back to, in most cases a disparate group of both ordinary and extraordinary individuals that were spread over hundreds of years.
It was a great series.