I end up having similar conversations with college folks (interns mostly). I usually say something along the lines of:
If there’s something that you’re so passionate about that you’re going to do it regardless, it’s worth taking a shot at making a living at it. Things like writing, acting, and music are really hard to to make it in, but if it’s really a passion, you might as well give it a go. It’s good to have a Plan B though.
If you aren’t super passionate about something, or you don’t have the starving artist mentality or whatever, next is to look at things you’re good at that you don’t hate, especially if there’s room to grow in them. If you’re good at math, for instance, you could consider being an accountant.
If you don’t feel like you have any especially marketable skills, then you’re looking for something that’s more broadly available, like retail or whatever. Of you can find something that teaches a skill, that’s a plus.
Broadly, there’s a passion, there’s a career, and there’s a job. There’s nothing wrong with any of those, but people tend to be happiest in that order. I personally wasn’t super passionate about anything, but liked computers, got a CS degree, ended up as a software engineer at a rocket company, and now manage the software organization there. There were other things I enjoyed, but I figured programming was the most marketable, and that’s worked out for me.
What people tend to like or hate the most about where they work are the people and/or the boss, and that can be good or bad pretty much anywhere. Good to watch out for red and green flags when you’re looking.