I learned English myself and then did a master's degree in it. You need vocabulary to communicate and while learning vocabulary you practice pronunciation. Then focus on small readings, translations, small writing exercises and then study grammar. So, remember basic vocabulary and sentences, intermediate paragraphs, longer readings more vocabulary and finally advance would include the advance grammar. If one wors in grammar fist it is harder. Build the foundation first.

I could say "you should look for some short books with a lot of dialogues and with a interesting plots", but where do you find a book like that? My experiencie: I 've improved my english since I have been reading english books; I love reading manga (Japanese Comic) / manhwa (Korean Comic) traslated to english, and I've learned a lot of vocabulary and I can understand better the composition of the sentences. If you want to try with manga/manhwa traslated to spanish you should search in Manga Here Spanish, and, for example you could read this manhwa, 1) http://es.mangahere.co/manga/nineteen_twenty_one/ (Spanish) 2) http://www.mangahere.co/manga/nineteen_twenty_one/ (English) I think It's a good alternative because is free, there are a lot of stories, you can read the english version if you don't understand the story and the pictures will help you to understand and to remember the meanings of the words. Remember!! if you read a manga (Japanese comic) you must to read from right to left.