She spends some time taking a cat nap - not strictly necessary, but very nice - before seriously settling in to figure out how to make some money. There's ATMs, of course - ones in other cities - and she doesn't exactly have the qualifications for a competitively paying job...
Robbing ATMs is currently of uncertain benefit to her, though. It'd be good to have alternate income streams - once she establishes herself as a supervillain, those should be easy to come by... Hmmm, of other crimes, there's always robbing jewelry shops, or just flat out forging things to sell - pawn shops tend to be pretty suspicious, though, and she bets that'll be worse here. But if she can get ahold of the raw materials, her powers do actually lend themselves decently well to jewelry making, allowing her to launder stolen jewelry without much issue...
There's also always legitimately selling her art, but that's boring and would require some time to get established anyways...
Hmmm.
She heads to the library. What does the internet have to say about ways to make money with powers - ? Surely there's something technically legal (other than being a cop) even if just in other countries - and Ruby's fast enough that even the other side of the world isn't a horrible commute away. As long as their currency exchanges to USD, she'll be fine. (And obviously there's a whole host of ways to make money illegally, but she isn't in the mood to tie herself to an existing gang, which cuts off a lot of the usual means.) Bounties, maybe? One off 'consultations' somewhere with money but no real rule of law?
(She isn't entirely familiar with this computer style or how the NSA works in a world with parahumans, but she does do what she can to make herself harder to track, just in case her searches trip any red flags. Won't be the first time she's ended up on a watchlist, though, and she'll be doing her supervillain debut soon enough anyways.)