One thing people commonly find when they investigate biomedical treatment for autism is a profound sense of confusion and overwhelming complexity.  Insanely restrictive diets have been touted as 'not that difficult', supplement regimes seemingly better suited for triathletes than autism have been described, beneficial bacteria, anti fungal agents, hyperbaric oxygen treatments, detoxification protocols, and a battery of tests that remind first time parents of exactly how long it has been since high school biology and how much they don't know. 

The first rule is, don't worry, it isn't as hard as it looks.  You can start biomedical treatments with your child very, very easily.  What you are working towards is worth investing some time to learn; and you don't have to know the difference between a neopterin and biopterin in order to start helping your child tomorrow morning.