It turns out that the answer is "painfully straightforwardly". He found a job ad, he clicked the link, he applied to it, and he... got the job. No interviews, no anything.
Sure, it's an entry-level position at Dewey, Cheatem & Howe Incorporated as a "mailroom technician", because apparently every position is entry-level, but whatever. It's a famous investment firm and investment firms are good for making money, or so he's heard (by which he means he has this memory from the Before Times). It might be soul-crushing, but he won't find out until he tries, and when everyone else is... Like Thattm... well, it should be easy enough to shine.
He starts tomorrow, bright and early at 9AM, which he would usually detest but if this potion turns out to entirely replace the need for sleep, well... that won't be a problem anymore, now, will it?
Probably not.