So you have the file. Now what? Throwing it on your desktop won't help. Here is a 4-week study plan using the Gakushudo N5 PDF.
The JLPT has five levels: N1, N2, N3, N4 and N5. N5 measure the level of understanding of basic Japanese mainly learned in class. 日本語能力試験 JLPT gakushudo n5 pdf
You already know Hiragana and Katakana.