The US government made a pretty good career aptitude test. Not a lot of people know about it. Your partner can access it here:

https://dol-vets.careerscope.net/assessment

It's free. I'd give a solid hour to answer all the questions accurately. It tests some abilities too. Like mechanical thinking, attention to detail, stuff like that.

At the end it poops out two lists. Things you would be good at and things you would like. Sometimes there's a lot of overlap there.

Community college, trade schools, and apprenticeships are always a good way to start a career without huge monetary and time commitments.