On daily commute rides I start with a regular breakfast. I do ride 80 to 100+ miles club rides most weekends. Many are some distance from where I live so I and another rider carpool. We stop at about 45 minutes to 1 hour before arriving at a fast food joint. Our favorite is eggmcmuffin meal with coffee. Seems to be just right to get the ride started. Most rides are supported and food is available at from 15 to 30 mile intervals. Some food and proper hydration is a necessity. Learning how much is another story. To much and you suffer and too little and you suffer more.
Phil