@luckie1367 says “CCC course catalogs should say if the course is CC transferable.” She means if the course is UC transferable.
@eagle21, I recommend you take major prereqs at CCC. You can try to ask a UC if an Ohio CC course is transferable but it is one of those hypotheticals that they don’t like to answer until you show them a course syllabus and whether a department will accept it upon petition. Lots of hoops to jump through! Perhaps you can take GE courses at your local CC, according to the IGETC plan - freshman comp, social sciences, and arts & humanities courses.
If you are 18 years old, I don’t think you need permission from your local CC to dual enroll (high school and CC) to take online CCC classes and you don’t need a HS diploma. http://home.cccapply.org/colleges/requirements