Shouldnt level 2 be the goal and level 1 be at least?
I agree buddy we need to know your level of competancy first and how long you've been studying etc. A fully fledged grammar book would have meant very little to me when I first started which is why my first book was a simple Hiragana one because at the time I couldnt physically read the kana.
1) Learn Hiragana
2) Learn Katakana
3) For beginner level up to JLPT N4 ,pick up a book like Japanese for Busy People/Genki
4) For pre-advanced/advanced level, it's mainly learning of grammar, vocabulary.