I know it all seems overwhelming and at times Changwattana can be intimidating (or any immigration office that is). But you can do this. Go in. Take a ticket for N2, normally it isn't that long - better still make an appointment online. Go in with whatever documents you have from your college and speak to the immigration officer. Most of them are friendly. You can do this. Hang in there. You'll probably regret leaving without thinking it through. Lots can happen in 30 days. ⚘
My visa was cancelled as soon as I graduated, and then I was granted an extension. Last year we needed a letter from our Embassy, so if you don't have permanent employment then you need to say why you are unable to fly back home. If you have permanent employment then it's not a problem. The school/ employer will complete the necessary paperwork. My visa hasn't changed, yet I have been given a work permit.
I was told the same thing at both the Muang Thong office, then they sent me to Changwattana who said the say thing - i.e. wait until the next announcement.
I was at immigration this morning and was told they simply don't know what's going to happen next. My Ed visa has been cancelled (as I've completed my degree) and they cannot change it to a tourist visa - not yet anyway. The only advice they could give: listen to the government announcements everyday, something must be decided before the 31st.