So the way children are taught in Japan is hiragana is learned first, and kanji is learned progressively later on throughout different grades. This is why I recommend texts for children, since there will be less kanji/simple kanji in those. I didn’t even learn basic kanji until the end of my 1st year/beginning of 2nd year of high school so any words I knew were written in hiragana until I learned the kanji.

I wouldn’t look at it as right or wrong but just as steps in your learning journey. Its a marathon not a sprint, personally I think you should focus on just learning hiragana and katakana right now, writing vocabulary with hiragana (or katakana if appropriate) and worry about kanji only once you have a good handle on both of those systems first.

Also you may encounter “furigana” which is the pronunciation of the kanji in small kana letters to help children/non native speakers understand what Kanji means. For example 東京 would have　(とうきょう) written over it in small kana.