You're going to the States to do your training? Pragmatism isn't perfect there but it's a lot better than the tortuous numbers with which one had to come to grips in the UK.
In reality aviation maths is quite simple. It's not free thinking. There are a set number of circumstances where you'll need numerical agility and care. Once you've got your head around some basic concepts such as fuel planning and some navigation fundamentals you'll probably find that you invent your own short cuts to suit your own brain skills.
Best of luck.