Backpacking as a solo traveler

Hi everyone, I’m planning my first solo backpacking trip from Sri Lanka to Thailand, Vietnam and laos for 2 months straight. I'm trying to organize and book everything entirely on my own this time.

​Since it's my first solo trip, I’m a bit nervous about a few practicalities. I would love to connect with any Sri Lankans who have personally done this route recently, or anyone who has backpacked these areas on a tight budget.

​Specifically, I have questions regarding:

•​ How Sri Lankan immigration at BIA handles solo tourist departures.

• ​Managing travel funds/currency exchange from SL.

•​ Reliable local transport options (sleeper buses/trains).

• accomodations recommendations (if you have any)

• safety issues (if any)

• any other things i need to know

Also, please share your experience with me i have a lot to learn since this is gonna be my first time