I am not learning Japanese, but I am learning another language (Spanish), so here are my tips:
-Try and practice a little bit every day (pronunciation, writing, generally speaking). ITTTT HEEEEEEELLLLPPPPSSSS
-Write down words, how you pronounce them, and their meanings. Take notes!!
-Attempt sentences
-Do classes or apps to help you learn!! Everyone talks about how good Duolingo is and they aren’t wrong that it works, I recommend using it! Also, in-person classes or people you know who speak the language, if they are available to you, can be handy to help you learn! (My dad speaks Spanish decently and I can practice with him, I’m also taking a class on it next year lol)
-GOOGLE TRANSLATEEEE. It might sound goofy and google is NOT always right but it’s nice to have on hand for when you forget a certain word
-Repetition is key. Keep saying words until you lose your voice /j
-Try to learn the slang! Some things only tell you the formal way to say things. Find the informal or slang ways of speaking, it can be really helpful!
-I would take note of grammar rules different from English so that way you don’t mix up. For instance I have to make sure that my adjectives come after nouns when I speak Spanish instead of doing it the English way :)
Also, for Japanese, if I were you I would try my best to write and memorize the characters!
It’s pretty cool you’re learning Japanese. I hope this helps you :)