Closer to your heart, perhaps, is Sugar Shot to Space:https://forum.nasaspaceflight.com/index.php?topic=36487.0
There have been a number of claims over the years for the first amateur flight to space. In the early '60s, there was a group that claimed to have reached space with a four-stage balloon-launched rocket (a rockoon), each stage a cluster of Coaster Corp motors. Later, Bob Jones claimed to have reached 150 miles, with an entirely homemade rocket, also launched from a balloon. I believe the Pacific Rocket Society, in one of its incarnations, claimed to have launched a rocket into space. ISTR that some of the high-power rocketry folks that launched/launch at Black Rock might have tried.
There were probably others that I have forgotten or never heard about.
Then, there is the issue of exactly what "amateur" means, in this case. Mainly, must the rocket be built from scratch?
Imagine IIRC permeating this entire post....