First advice I can give you is to not limit yourself to one location, Especially Chicago! And especially with Neurology match rate dropping for DOs! Otherwise, just go in and try to learn as much as you can, use good online resources like anki/uworld etc, plan to take USMLE step 1 and 2, avoid getting any red flags like failing classes/board exam or worse repeat a year, and plan to do audition rotations in early 4th year.