Hiragana is actually very easy. I memorized it in three days, no tricks or anything. Memorization is all about repetition and association, after all.
Copy down that whole hiragana chart on paper. You can ignore the section under "yoon" and also the two in red, but write the rest.
2. Familiarize yourself with them, and definitely pronounce them out loud as you study. Which have you seen before? I'm sure you know about の already, for example.
3. Pick one of the hiragana. Any of them. Now, take out a piece of paper and write that same hiragana until you fill half the page. Pronounce it every time you write it. This is memorizing through repetition. Do this for 5-10 hiragana. Don't skimp! This is easy, man.
Go to the Hiragana tab. Check all. Go to the Katakana tab. Uncheck all. Now go to the Practice tab. This is self-explanitory. If you're having particular trouble on a certain character, just go back to Step 3 for that one.
Keep at it and you'll be able to read hiragana in literally a matter of days. After that, learn katakana with the same procedure. Seriously, compared to learning kanji, hiragana and katakana are fuckin' cake.