Taking some courses to know how to form sentences , pronounce words , spell , some grammar and basic vocabulary are the initial steps to start with ,where you would need help from a tutor or teacher then you can do your own effort depending on audio, video materials and others like ":
Music and Books as Alonso mentioned.
Watching Videos in english
Speaking with natives is very effective in improving speech and expressions .
Grammar Exercises and repetitions of words already learned .