Learn kana characters in the most efficient way. Here are some of the best resources you can use.
Hiragana Katakana self-learning materials
Kuma Learn - Blog - Remember hiragana, katakana with mnemonics
Learn Japanese Hiragana, Katakana and Kanji N5 - Workbook for
No Babbel Japanese Course? Try These 6+ Japanese Free Courses
Japanese Alphabet: The 3 Writing Systems Explained - Busuu
Japanese Hiragana and Katakana Made Easy: An Easy Step
How to Learn Hiragana - Team Japanese
Easy Japanese Reading Practice
Learning Japanese Hiragana and Katakana: A Workbook