duolingo is shit for japanese imo*, here are some apps i reccommend:

Hey Japan - comes with a cute shiba inu bc fuck that aggressive owl. its basically duolingo made specifically for japanese and much better at teaching you HOW the language works.

Kanji Study - its the grey one, made by one person. it covers the first 80 kanji plus the main radicals that make kanji up, PLUS hiragana and katakana FOR FREE. you can practice by drawing, flash cards, multiple choice, and you can decide whether you read or select the romanji/character/meaning. i learned hiragana in 5 days using this. the upgraded version (one time payment) with higher level kanji goes on sale a few times a year, consider supporting the app if you find it useful

Todai - more advanced but good for reading comprehension. japanese news in... japanese. highlights which JLPT level words are and gives percentages of each level for each article. has inbuilt dictionary to check words you dont know.

Takoboto - my preferred japanese dictionary but there are loads out there. i like it bc i can search in english, romanji, kana, or kanji and it breaks down kanji compounds into individual characters. it also shows different conjugations eg: to eat, eating, ate, to be able to eat, etc

those are just the phone apps i use, there are so many other resources out there that are free and not pulling bullshit like skipping one of the 3 'alphabets' of a language

*to be clear the reason i think duolingo is shit for japanese is that it doesnt follow the JLPT pathway. which... you dont NEED exactly, but i think the country that had to make a new, easier language profiency test bc not enough people were passing the existing one will know how to build courses that teach their language. plus duolingo is doing *gestures* whatever shit that is up top.

if you seriously want to learn japanese, memorise your kana (drop romanji asap or youll forever struggle and I'll come to kick your shins) and find the ebook of genki 1 that someone uploaded, or some other JLPT N5 course. but NOT duolingo.

Edit: just realised that duolingo may be your only real option if your first language isnt english (too easy for me to forget, sorry). in that case, make sure you supplement duolingo with your own kanji study!!!

Link to all the Genki exercises that let’s you do them in different ways (writing, matchups, multiple choice etc)