Yes, not only can you earn a High School degree via Job Corps, but you can also earn college credits, two critical components to helping you become an eligible candidate for university. Beyond that, it may take time to develop add'l credits, skills, that make you an even more attractive university candidate, depending on the school and degree you are pursuing. One thing to remember, it may take numerous applications before you are accepted to a particular school. I have a dear friend who applied to the same school 3 times in as many years and she simply kept building her resume/credentials until she was accepted. The road may be long, but it's possible.
Definitely don't hesitate to look up colleges that you are interested and apply! Best of luck!