Hi folks, I'm in a strange predicament. I have a CS background.

I originally set out to learn some computational fluid dynamics because I thought it would be cool to do visualization stuff with that. Anyway I looked at some resources and realized I need to learn about PDEs/fluid mechanics, so I studied calc/differential equations which became a distant memory from highschool (was extremely time consuming). Then I went looking for courses/books on fluid mechanics but realized I need to brush up on my basic physics and so on and so forth. I just keep going back and back in this endless prerequisite procrastination. I don't know what to do, on one hand I could just go ahead and read material on CFD but that would be pointless because I wouldn't understand it but on the other hand I really want to understand deeply - it's recursive too because I don't just brush up on the past stuff I feel insecure and want to understand them deeply too before moving to the next level.

Does anyone else experience this? Can you offer me some advice on how to deal with this weird insecurity procrastination?