I'm Japanese, and it's true that Japanese is very difficult.
It is necessary to use many characters such as hiragana, katakana, and kanji, and there are also words that differ only in intonation, such as "雨(rain)" and "飴(candy)", and words that only differ in the characters, such as "公園(park)" and "公演(performance)".
In addition, it is a very troublesome language to be honest, with changes due to honorific expressions, too many first person words, and too many variations in sentences.
It may be a tough road to learn this language, but I'm happy that you are interested in Japanese, so I will support you!
By the way, if you can read this sentence, it's awesome→「3月1日は日曜日で祝日、晴れの日でした。」
The scary thing is that all Japanese junior high school students can read this fluently. Even I don't understand why I can read it...
To learn Japanese quickly, I recommend watching anime aimed at young children. (Actually, I also watch English works for young children to learn English.)
I think it's a good idea to memorize the words in parallel at the same time, starting with the simplest ones.
A friend of mine said, "If you learn using the same steps as native speakers, you will learn quickly."
皆様の日本語のご上達を心よりお祈りいたします!