Adding a bit to the porn angle, there are options that don’t require exposing herself. There’s people that get around creating PMV and HMV (porn/hentai music videos) and JOI variations, so that’s basically video editing skills.

If she’s ok with only “showing off” her voice, she could try some amateur VA work. That might require some initial cash setup in the form of a decent mic and some soundproofing, she’d also need to do a number of gigs “for free” as a demonstration to anyone who decides to hire her.