Where you are is there an option to do low cost short courses? I've told young people who don't know what they want to do to look at a short course guide at a local institution and give a few a go while also working. They're usually one night a week for 10 weeks and can be on a wide range of topics such as arts, technology, food, mechanics, etc. Better to drop a few hundred into a short course to see if you like the topic before going all in at university.