Hi Kamiotamega,
I see you asked about Japanese particles and I just had to recommend this great particle
dictionary. It has every particle and combined particle you will need in modern Japanese.
I was really surprised to find a dictionary that was JUST for particles! I even wrote a blog post about it.
You can see some pictures on my blog. All the kanji has furigana (kana above the kanji to help with reading) and the author chose really simple sentences so you can focus on the meaning of the particle and not get stuck not understanding the rest of the sentence. In any case, there are translations for everything.
Good luck!