I currently fly mapping survey and aerial photo work, and I've worked inside CVG and CLE airspace about a billion times (used to fly freight into CVG all the time, too). CVG and CLE both have some great controllers who will probably make things go smoothly for you. Now, if you are LANDING at either of these airports, that's gonna be a handful for sure. Transitioning thru the airspace probably won't be that bad.
Advice for a student pilot? Listen for and comply with all vectors without delay, try not to get flustered on the radio and keep your transmissions (especially readbacks) short and sweet. You will be given lots of traffic calls most likely. If you are transitioning on the outskirts of the airspace, things won't be too bad (although the area between CVG and Dayton can get pretty congested), but things get more hectic the closer you get to the airport. Also, the arriving and departing "pushes" come in waves - quiet one minute, then busy the next.
BTW, I see you go to Darby HS in your profile. I fly out of Darby Dan.