looks like you got some good ideas on what to do. the level 1 is good. the exercise science and nutrition background will be real helpful. If you want a mainstream certification that will validate you i.e. put some letters behind your name, the NSCA is a well recognized respectable certification. They have Certified Strength and Conditioning Specialist but you have to have a degree in an exercise related field. For those that don't have the degree you can get the certified personal trainer which in most circles is recognized as a good legitimate certification. you are a bit far out to look at insurance at this point. i would work on building gear a coaching exeperience and finding a town with good demographics and a need for a crossfit gym. good luck. if you need any more help PM me.