A question having nothing to do with Glowforge; I have an Imaginary Gadget that can take your mind with what you personally know and transport it to a 15 year old freeborn person (not royalty or slave) any time or place in the past, your only advantage is what you know, and you can only use technology that is common, or what you can personally do with it. (You couldn’t make a Damascus Sword unless you could personally do so now, you could not build or sail a ship if you could not do so now) Presume you look like everyone else and can speak the language.
#1 where and when.
#2 what would be your first program to have the ability to succeed in the culture.
#3 What would be your ultimate goal.