SH728

I have recently (within the last 24 hours) gotten my BTECH GMRS-PRO setup... I think. I am VERY new to this and honestly don't know much about what I am doing. Yes, I have a license. I haven't changed any frequencies that came programmed, rather only changed the names for my OCD sake. In regards to use, myself and a group of buddies plan to use the GMRS system when on "operations" and training exercises utilizing < 5 mile range. What is my best options when it comes to frequencies, high/low, settings, etc. I am not familiar with what high and low bands are, what the correct MHz need to be. Any help would be appreciated. Anyone close to I-85 near the VA/NC border? Would love to chat and try and test my new GMRS device!