may have a problem with immigration as you have to show ✈️ existing the country after your 30 days some airlines will not let you board without an forward/existing ticket
I did the same last Oct my Thai wife went to immagration no problem with extension but gave her a fine for no TM30 and $350.00 china airline to cancel and rebook my flight home AND $8,600 hundred dollars for gallbladder removal because i didnt buy travel ins but i did get 3 months in BKK 5555🙏