I've mastered Hiragana... Now what?
Many people start learning Katakana after mastering Hiragana and probably before fully diving into learning Kanji. Katakana also is one of the most essential Japanese alphabets every Japanese learners have to study. There are 46 basic Katakana just like Hiragana. In fact, each syllable that Hiragana represents, also has forms in Katakana.