order of courses

Hello, in what order is it best recommended that I take the courses? I did the intro module and now im moving on to the understanding AFR module. or can I go ahead and jump into the tuning?

Absolutely, you should take the courses you want to learn about. You have access to the course forever, so if you feel you missed something in an earlier course (like learning about AFR), you can always stop, learn about that, then continue.

I would encourage you to look through the past webinars, too. There are hundreds of webinars about specific tuning topics, and you now have access to them, either scroll through them, or type words in the search box you are interested in (like dyno, ignition, idle, boost, Motec, Haltech, HPTuners, etc) to see relavent webinars related to those words.