I don't think it's feasible.

First of all, for anything they need, they might know what they need to build, but they have no way to reach the place where the raw materials are located. E.g.

Jim: "cool, we need gasoline to supply our trucks to transport materials."

Pedro: "To make gasoline we need oil"

Alexa: "Where does this oil is, and how do we reach it with our bare feet?"

Then, more importantly, they have no way to communicate and coordinate efforts. Don't forget that the race to the Moon in the 60's was a coordinate effort of an entire country, with hundreds of thousands of people working together according to a plan, backed up by industries and government already marching up to speed. There wasn't a rocket expert wannabe in each and every town in the US trying the feat on his own.

Without effective communication you cannot coordinate the effort. You will need more than a lifetime.

I don't think it's feasible.

First of all, for anything they need, they might know what they need to build, but they have no way to reach the place where the raw materials are located. E.g.

Jim: "cool, we need gasoline to supply our trucks to transport materials."

Pedro: "To make gasoline we need oil"

Alexa: "Where can we find oil, and how do we reach it with our bare feet?"

Then, more importantly, they have no way to communicate and coordinate efforts. Don't forget that the race to the Moon in the 60's was a coordinated effort of an entire country, with hundreds of thousands of people working together according to a plan, backed up by industries and an government already up to speed. There wasn't a rocket expert wannabe in each and every town in the US trying the feat on their own.

Without effective communication you cannot coordinate the effort. You will need more than a lifetime.