Definitely second the real food on the bike. I find palette fatigue keeps me from taking in enough carbs. Eat real food - I like oatmeal bars or rice cakes much more than gels. On a 75-80 mile ride I have 3-4 bars or flapjacks and one gel and find that works for me. Also, hydration, I have one bottle of water and one of electrolyte every 90 minutes to 2 hours. I’m a heavy sweater, so you made need more or less. It’s best to practice fueling on your training rides (indoor or out) to find out what’s best for you.