So I got the Spanish translation of "Harry Potter" and started reading, and sure enough, I didn't understand almost anything at the beginning, but I kept on reading because I loved the book, and by the end of the book, I was able to follow it almost without any problems.
Así que conseguí "Harry Potter" en español y comencé a leer. Claro, no entendía nada al comienzo, pero seguí leyendo porque me encantaba el libro, y al llegar al final ya podía entenderlo casi sin ningún problema.