Is not studying grammar beneficial or harmful?

(Before I get comments about it, yes there is no single “right” or “wrong” way to study and if it works for you, then it works. It was just that I had some fellow learners were wary of my learning method and wanted to get some outside opinions.)

I’ve been studying my Germanic language (TL) for around 3-4 months, and am still pretty beginner as of now. My language learning routine has been this:

~ I use a course taught fully in my TL from the start. Because it is taught in the language, grammar is not explained all that much other than a few sentence/conversation examples.

~ I make/use my own anki audio-based deck using what’s taught in the class. I don’t use any premade cards or decks.

~ I do an hour of listening daily. It is either beginner level comprehensible input or kids shows translated in the TL.

My other language learning friends were saying that me not studying grammar directly will be detrimental to my learning/understanding in the future. Is this something I should be including into my routine?