Three things I've learned about fruit as an adult:
The apple core is a lie. If you eat the apple like there wasn't any core, it'll taste just the same and you'll barely notice it (and even if you bite through the seeds, you have nothing to worry about unless you eat a metric shit-ton of apples every day).
Also: eating the whole apple (and the stem, although it's a bit hard to chew) is good for your microbiome.
Kiwis don't have to be peeled. Just wash them and eat like an apple. You'll barely notice the difference, while the fuss goes down 80%
Oranges that are hard to peel (like blood oranges) become very easy to peel if you roll them between your palms for a few minutes, applying gentle pressure.