Great job looks like you have made a leap....... expecting full docs on a project from guys that have a ton of stuff on thier plates is like asking for the happy ending for free.
very stoked to see where you take this.
This site has a list of APN info for network providers
http://www.hw-group.com/products/HWg-Ares/HWg-Ares_GSM_APN_en.html
I use an unlocked huawei e398 with the config in the thread.