Typically you need at least a Bachelor's degree to be an Engineer ( 4 year degree after high school). Some engineers have a masters degree
you can either start engineering school right after high school or start with a community college and then transfer out to a 4 year school( university) to continue the major.
Note that some community colleges do not have engineering majors, so please make sure you ask about the list of classes that will be transferred to 4 year school so you do not have to retake classes after the transfer.
Hope this helps!