I found this website you might want to look into https://soundbetter.com/s/producers

Edit: I also talked to some rock producer, this is what he said:

"My advice would be, to KISS. Keep it Simple. Start small. See how people react. Begin a following. Start pushing content.
If she already has a following of "hippie"/fold people, I would suggest asking them, "what do you suggest I do next?"
Perhaps a recording of an ep of 5 - 6 songs"

He also provided me with an email you could contact him through if you want to talk more about your options. I personally don't know him or how much he could help you, but it's a start.