Welcome to the forum! I can understand your concerns about hydration and using a fan or non-fan setting.
When it comes to baking with a fan (convection), the heat circulates more evenly, which can be great for achieving a consistent bake. However, it’s often
recommended to reduce the temperature by about 20°C (or 25°F) compared to a conventional oven to avoid over-browning. So if you're baking at 200°C with a fan, it might be worth trying 180°C next time to see if it improves your results.
Regarding hydration, 60% is a good starting point for many recipes, but if you're comfortable with the results you’re getting, there’s no need to rush to increase it. Higher hydration doughs can be trickier to handle, especially if you're using a Kitchen Aid. If you’re looking to experiment with wetter doughs, maybe start by increasing hydration gradually, and see how it handles with your mixer. Adding a bit of flour at a time can help if the dough starts getting too sticky.
Hope this helps, and happy baking!