Glad to hear Tien and went through the complete explanation you have provided. Seems to be on the right track in releasing oneself from the pain of sansara.
Certainly, Lal has been doing most profound work in spreading out correct teachings of Buddha and let him achieve supreme bliss of Nibbana in this life itself.
Your assessment of how ant would have been a deva or brahma or manaussa is correct and that is how anyone can become if not becoming a sotapanna.
May you attain supreme bliss of Nibbana by becoming Arahat soon.