You mention that you have never been abroad. Well, maybe Thailand is the best place for you. In many ways it is a nice place :-) Yet, maybe it could be interesting to see other parts of the world?
I once moved to Germany for some years because of work. It was interesting to move to a new country, meet new friends, learn about a new culture, see many new things and so on. Yet, after a few years, when the project at work was finished, I moved home. While seeing my home country from a new perspective from outside, I had learnt to appreciate the good things in my home country even more :-) I am very happy that I moved to Germany, and I am also happy that I moved back home afterwards :-)
Some people move here from Thailand. They seem to have slightly different feelings than me; usually they don't move back home... :-)