I learnt everything I know from a text book, a note book and locals in a village in isaan 15 years ago. Took me 3 months to be conversational but bear in mind I was really immersed, no internet, no foreigners. I used to bring my text book and sit with locals in the evening after my shift at the local school. They were more than happy to help me read and understand common phrases of which I'd write down. Reading I took upon myself, it came naturally after probably 3 months, again from a book. . I still say I'm primary school level at reading and middle school level at speaking but it's enough. I don't read the news. Just enough to understand it conversationally and get by.
I finally got a message through today from the mother of my daughter saying her school will be closed on both days. I was confused as had heard different things from different parents.