Rodrigo,
I would suggest you start by defining your taste in photographic prints. What sizes are you most likely to want your photos to be and do you prefer matte or gloss/luster finishes, or some of each depending on the photo? Once you sort those two things out, you have usefully narrowed the choice. Narrowing the choice is important because the options are very numerous. Then there is price: do you have a budget ceiling for how much you want to spend on printing for say the next six months? That will narrow choice further because papers vary a lot in price. Speaking of which, you will probably get better pricing in Chicago than you will in Vancouver, but if you are going to Chicago first it could be a pain to travel from there with a lot of paper, unless you plan to have it shipped.
Next, you should do your research. If you are new to printing, you should watch the "Camera to Print" tutorials on this website to better understand what you are getting into and what the possibilities are. Then you should read the reviews of papers that have appeared on this website over a long period of time. Several other websites (for example, Northlight Images) also have reviews of paper that are not advertising. Then, once you've seen which papers may appeal to you do your price comparisons on the internet by looking at sites such as B&H Photo Video, Shades of Paper, etc.
At the same time you are doing all this, if where you are in Brazil you have an actual photography store that sells inkjet papers, they would also have sample books provided by the major paper manufacturers that will allow you to see and feel the various papers first-hand, perhaps the best instruction of all.
With all of this, you will be able to make sensible decisions about what paper to buy. Notice I have only recommended to you an approach for finding out what you want, I am not recommending particular papers, because in the final analysis, it is a decision that largely depends on personal needs and preference.