I agree. In my experience at least, learning high-frequency vocabulary first can indeed speed up the acquisition of second-language literacy. In the case of Jap

I agree. In my experience at least, learning high-frequency vocabulary first can indeed speed up the acquisition of second-language literacy. In the case of Japanese, though, individual kanji function mainly as subcomponents of vocabulary, not as entire words. If you are still getting used to recognizing individual kanji—if they still look mostly like indistinguishable squiggles—it might not hurt to practice them in order of frequency. But if your ultimate goal is functional literacy in Japanese, it would be better to spend more time learning high-frequency words—nouns, verbs, adjectives, adverbs, etc.—and how they are written, whether that be in hiragana, katakana, kanji, or some combination.