The beginning is hard so it’s okay if it’s difficult, but it’s hard to say if you’re using it wrong without knowing what you’re doing, where you’re at, or how long you’ve been stuck.
I went into bunpro knowing almost zero grammar whatsoever, struggling with the most basics concepts, and am now doing the N2 grammar without much difficulty at all.
In the beginning I really was just smashing my head into a wall. Things barely stuck, I was slow, and nothing really made sense. I did end up reading a bit of taekims grammar guide, found it incredibly boring and difficult to absorb such a long document (but I do think it’s a good one, probably) even going through little by little each day, so I instead watched the first 12 lessons of cure dolly on youtube (I did one per day honestly) to get the basics down, powered through conjugations with the cram function, and just read a bunch of manga/vn with word lookup tools. It was painful. Slow. My comprehension was awful and it took a very long time to get through my choice of entertainment, but I persisted. Slowly got used to some of the grammar points I’d learned, reinforced my kanji and vocab knowledge, and got much faster at reading in general. It’s okay to not understand or if things don’t stick well yet. I still have those moments, but they are vanishingly more rare.
Continuing reading I kept doing the reviews and 2-4 new lessons, every day. I smashed cram on every grammar point I struggled with for N5/N4, particularly ones with conjugations or where I wasnt sure if (A) or (B) was transitive or intransitive (に and を can be difficult here).
Now past N3 I just comfortably read whatever I like reading every day, do zero cramming or effort study and let reading deal with most of the nuance over time. Still have to look grammar up sometimes, but it’s fine if I don’t fully understand as long as I can keep getting practice on what I have studied. Bunpro has done most of the work for me in terms of recognizing grammar, but the real practice that makes thing stick long term comes from reading. No way I’d understand these things from only studying without immersion. I don’t think our brains work well for that. Implicit knowledge from immersion and seeing things repeatedly in context will also help a lot when you try to learn the explicit knowledge and vice versa.
At least that’s been my strategy. Everything gets easier if you read a lot even if it’s a complete pain in the ass in the beginning when everything is slow and nothing makes sense. As a beginner I can really recommend anything with pictures that help give context so you can easily tell when you’re misinterpreting something in the text.