is this a weird/inefficient way to learn a language?

I never really understood how people learn language based on rules and stuff I just find it really hard and unnecessary in most cases. For example we have English classes in my country as the main foreign language to learn. I've always watched and read stuff that were in English ever since I was little I picked up the hang of how a sentence is supposed to flow what everything means and connects with each other in time by seeing a lot of sentences. I suppose my current grammar could use some work, but other than that I believe my English is decently well (B2-C1 based off a couple tests I did). I'm currently learning (TL)Japanese, I've learned hiragana, and katakana, currently learning kanji words. I'm using a well made deck in Anki (an app where you can make decks of cards of various stuff to learn stuff, be it be language or some school subjects) it has sentence examples with every word. I've already picked up on a lot of stuff to form a sentence. A lot of words in the sentence the deck never teached but I could figure'em out just fine from the English translation. I think I'm learning decently well for now. Like if I know the kanji words I can translate a sentence mostly fine if not, atleast roughly so that you'd still understand what it means. I did watch a few tutorials of Cure Dolly, she gets in to a lot more detail about forming sentences like how to form them what each thing means etc. I still find my method of just learning it from just reading both the sentence and it's translation more basic and fun though and plan to do it for any other languages I might learn in the future. Though I suppose it could be of use if I, properly learned the grammar. What do you think I should do? Is this a fine way, or should I just learn it from cure dolly(A youtube channel that teaches Japanese) or places like that.