Looking for some advice or anyone with a similar experience.

I am holding a Singapore passport and have been in Thailand on an ED-Visa for the past year. As it will expire by this weekend, I have already cancelled it and left for Laos via land (chiang khong) today. My plan is to stay for 3 days and return to Thailand by land on Sunday.

Btw, I will be starting my thai language studies at chula in Jan 2025. Would this info be useful for the immigration to allow my re-entry? Chula has asked me to email them a copy of my entry stamp and they will prepare the paperwork for me to take to the immigration office to change my visa-exempt stamp to an ED-Visa stamp.

Will I face any issues when I pass through the Thai immigration? Will they have any extra requirements for me before I can re-enter? Eg. Cash, flight tickets...

Thanks!