About 450 millions of people speak Spanish as their native language in Spain and many Latin American countries. Spanish is rather easy to learn, just the tenses will probably cause you some headache. There are some differences between European and Latin American Spanish as far as grammar and vocabulary is concerned but you’ll understood everywhere. The other way round, it can be a bit tricky. Colombians, Ecuadorians and Peruvians normally speak a pretty clear Spanish while the pronunciation of some sounds differ quite a bit in Argentina and Uruguay. As far as reading is concerned, you won’t have many problems. If you’d also like to practice your spoken Spanish (for example by talking about the contents of the latest graded reader you’ve read), look for an online Spanish teacher on italki.