Thank you for your answers, they have been very helpful. I appreciate all of your comments, but especially Pianistimo's, because of specifying which were the notes I was supposed to play.
About choosing another Sonata as my first one to learn, I am determined for it to be the Pathétique, but of course I will learn some other small pieces in the meantime, for having more experience. I also appreciate your recommendations, and surely I will study some of the Sonatas you have mentioned. You have no idea how grateful I am for your help, I thought nobody was going to reply. Anyway, if I can help you in something, someday, you can be sure I will be there. Thanks everybody again.