Hell's Iris, the Maelstom. Make pacts to become a Sorcerer and try to attain immortality. Try to stay out of the big stuff find a nice wizard tower of doom to settle on deep in Corsair Country.
Then you'd have basically 3 options. Join the Guard(which may not be an "option"), put your head down and work those ungodly work shifts, or move to the Underhive and try to make it there. I'd go for the Underhive personally.
IKR? Ok Ive thought about it. I'm not nine nor do I have the money for cybernetics so being a space marine is a no go. take me to a random hive world. Any planet will do so long as the population is high enough and the "law enforcement" doesn't care too much for it's citizens. Live as a psuedo-citizen going from hive city to hive city. Sneak into the poorest of imperial citizen's homes at night, murder them, steal all their food, and leave for the next hive city. (One household per hive city to avoid detection.) Rinse and repeat until Khorne senpai notices me and kicks me some "gifts". Continue what I'm doing but move further and further out into the wilderness. Killing people that get too close. Become feral and a nightmare that mothers tell their kids before they go to sleep. ?????? PROFIT!
So, a few notes. The Adeptus Arbites are basically the Judges from Judge Dredd. Plus they're an intergalactic agency. The space between Hive Cities tends to be a toxic wasteland from multiple millennium of relentless industry with no food, corrosive dust, and perhaps bands of raider nomads and man eating predators.
I'd land on a forge world and use my knowledge of VCR repair to convince the local mechanicus to let me join them. After years of study and boot licking, I'd become a full fledged tech priest and volunteer for the next Expedition for lost technology. Once aboard the fleet, I'd make friends with the rogue trader attachment and seek to join their crew. Once I've gained their trust, I'll scheme to steal the lost technology for myself and barter it for my own ship. Then I'd join @The_Dokta at his tower and live peacefully away from the crumbling Imperium to focus on rediscovering the lost knowledge of humanity. After that, clone a family and settle down. Try to return some humanity to the servitors. And when I'm old and breaking down, I'll seek out the Farsight Enclave... for scientific purposes. I'd recommend starting a Khornite cult and pretend it's a blood cult for the Emperor. That way the Arbites and Inquisition will take time before they move against you. Build up your influence and signal a blood ritual to summon the forces of the Blood God and be richly rewarded.
But how are you going to get them to not kill/lobotomize you as a tech heretic for knowing too much about ancient technology?
