Is there a basic how to exhibit?
Your club should prepare you and have all the material you need.
However, there are MANY resources online. Here are just a few. Google is your friend.
However…...Your state's extension office will determine the rules and objectives for your state 4H. You should read and understand the manual your 4H leader can provide you.
I would get in touch with national leaders and enlist the assistance of your state 4H coordinator as well as your county extension office, as they might be of some assistance. I admire the work you are attempting to do.
This is part II of a multi-part video. Might help.