Hi Xendula,
Finally got a reply! Thank you so much!
At first, I thought about Kindle too but I'm afraid that for South East Asian like me, I will have difficulties in getting the books or if something happened then it will take time and energy just to get a replacement. But, from what I read, Amazon has good customer service. That's a good point.
I prefer Kindle actually but Kobo seems more International to me. I could be wrong.
About Kobo, I'm thinking more into practical side. My friend is Canadian and it will be easier for him to get me a Kobo there. And even though Calibre is exist, I'm still worry that I won't be able to read some books that I want to read with Kindle.
Language is not a problem since I read English novels and books so it's not a big deal for me. I will ask my friends when he's in Canada to find out which one is better for me to use in Indonesia.
Thanks again for your reply. Hope I will pick the right one