@jwsmith2316 Welcome to GMRS. It may feel like drinking from a fire hose at first but be patient, you will get it just like the rest of us. Mark has a video for learning GMRS. I don't have the link handy but I bet someone will chime is soon with it.
A few points up front:
Channels 1-22 are "simplex" which means sending(TX) and receiving(RX) on the same frequency.
Channels 23+ are usually "duplex" which means TX on one frequency and (RX) on another. You will use this for repeaters. (+5MHz offset for GMRS but your GMRS radio should already do this for you.)
PL tones aren't private, they just filter out any signal that doesn't have the same tone. You will usually use this for repeaters.
Split tones just means a different tone for TX and RX. Some repeaters use this, most use the same for TX and RX.
Hopefully this background info will help you understand everything else you read.