The Basics: greetings, letters and numbers
Las Básicas: saludos y letras y números
If you are ever going to be fluent in a second language or even wish to have a passing knowledge, you definitely need to have a firm grasp of the basic elements of that language. You may not need to know the term for every verb conjugation, recognize every participle, etc., but you should at least know the letters and numbers.
Below is a list of articles to help you learn the basics of Spanish.