Fruit Questions- Help!

Hello everyone! I am a newer member of mfp but so far I love it. It's been a real help with my attempt to alter my diet. I am having a problem with counting the serving size of fruit though. I work at a hotel and my job provides me breakfast and I select a fresh fruit plate and it's so yummy. My only issue comes when I'm trying to accept for my calorie intake later. It is similar to a fruit salad with strawberries, blue berries, raspberries, honeydew, cantaloup and pineapple usually but it's all freshly sliced and not cubed in syrup.

Any idea on how many pieces are equal to a cup? I usually use about 3.5 cups but that doesn't seem to reflect enough as it's
enough that I feel like I've just had a meal, not a snack- and it's only about 160 calories. Are there not a great number of calories in fruit? I'm sorry I my questions are kinda dumb but I've never really paid attention to it before now. Also I know there is sugar- but it's not corn or cane sugar so is it okay to have so much everyday? Thanks so much for taking the time to read and reply!