Give him time. His entire world has been turned upside down.
Set a schedule, make rules, and stick to it. Do not try to bribe him out, but tossing really really yummy treats as you walk around. He will start following you for the yummy ness that falls from your being
Some people may point you to a 2 week shutdown. I have never used that, but a quick google search should find lots of articles.
Take him on walks, tether him to you, teach him what expected.
And be very very patient.
Congrats on adopting.
PS- noticed the name, are you a Coheed and Cambria fan?
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