Would this be too much sugar/carbs to eat at once?? It would be healthy and natural..?

I was thinking about making 1/4 to 1/2 cup of 100% rolled oats(first timer) and i was thinking about adding some raisins and dried plums and any healthy and cheap dried fruits i can find to them and healthy that i can find! I was also thinking about putting like some mashed up banana sometime and maybe another time a hot boiled fresh apple than mush that up, of course with some cinnamon as always! So like one time i would put just half a mashed up banana and half a boiled hot apple.. than the next time some dried fruits.. would this be bad for breakfast?? The 1/4 to 1/2 cup oats would be 75-150 calories and than i figure 200-300 healthy toppings.. so the MOST it would be is 450 and the least would be like 275..