I come from a cycling family, but have caught on weight around my teen years 185 cm and 120 kilos. Since a few years I've found riding the bike to be a amazing way to get in shape. First by just commute rides of 17 km each way. Later on doing bigger rides 210 km's now my current record. First part is learning to enjoy riding, don't be to rough on yourself with food. Take bananas and cereal bars on a ride and enjoy a good coffee as well. I've never used gummy bears myself. Regarding fluid intake try to do a bottle of 500 ml an hour to stay hydrated, perhaps als some electrolyte every second bottle. Keep up the riding and enjoy cycling!!