Watch some Spanish cable or Mexican soap operas with English closed captioning. This will give you excelent phonetics, the rhythm of the language, some intuitive sentence structure, and a good working vocabulary. While you’ll still need an academic grounding in grammar, you can get that from a book.
This is good advice. I found that watching kids cartoons in Spanish was even better. The vocabulary was smaller and they enunciated well. News programs too usually have good speakers.
Start with sesame street in spanish then graduate to other programming. Thats how my kids spanish teacher did it