Hello Mahboob and welcome to the solo forum.
As fellow travellers here have said, we are not immigration experts, and whatever your own government has negotiated with the individual nations you are considering,requires further research on your part.
Each of the destinations you’re contemplating has its own tourism website which will provide you with information about entry conditions and criteria.
I do however wonder why you are considering a long haul solo trip in the first place. Have you ever planned,researched and booked a solo trip within India?
I say this because solo travel isn’t for everyone. For one thing,it does require a degree of confidence which is usually gained by actual experience.
.I’m really not trying to undermine your intentions, but you’d gain so much by researching,budgeting ,booking and all the other myriad of travelling skills with an initial trip closer to home.