I'll echo what Rob is saying, you can also walk-in to any AiS store and get the same deal, you can even just grab a SIM and set it up yourself on the MyAiS app.
You aren't going to get a non-B without already having the business established, and you definitely aren't going to get a work permit without having 2m in capital for the business and 4 Thais working for you too.
unlikely, all the rules and requirements will probably be announced on the 1st of June but I don't see it being fully implemented and made law before September