Hi Ankur, You should definitely visit Thailand if you looking for an budget trip as it was also my first international trip. I have visited there and trust me the place is amazing. Other places you can visit are:
- Sri Lanka, etc.
Most of the South East Asian countries are considered budget friendly destinations but again it completely depends on which part of the country you're travelling to and how much you spend on flight fares, hotels, etc. For example, if you take Thailand, not all places in Thailand are cheap. You have to choose a place in Thailand which fits your budget.
It's actually depends on your budget if you have any fixes budget so let me know I'll suggest you as per that and also it's depend if you want to visit visa free travel country for indians or any other so visa amount will be added to your trip and it will get burden. Best is to visit visa free travel country
for best I'll suggest 1.MALDIVES