Well, I plan on trying to learn 5 languages before I turn 20, that's 6 years from now, and I would like to know how to approach it. And when I say lesson plan, please be specific, something like
Week One : Voc building
Week Two : Beginner's grammar, nouns
Week Three: Beginner's grammar, verbs...etc.

And the five languages are:
Spanish
French
Japanese
Igbo
Italian