To be comfortable shooting manual you will need to know what your necessary adjustments are. Though these settings are all numeric, there isnt some insane math equation that you need to do to find out what to dial them
Equivalent exposure value chart. Print this out and you may find it useful to help you quickly find all the different ways to achieve the same exposure in terms of different aperture and shutter speed values.
My brother wants the story to end with them all having died in the car crash at the end of season 1 and everything else has all been Hell.
What is the speed limit? It is hard enough going the speed limit now you have to figure it out too? What if you solve it wrong? All the people who never took algebra would be getting a lot of tickets. The answer is 45 mph.