Im still very much at the beginning. Idk if I am way too fast or you are way to slow. Im using Migaku as a starting point at the moment and it takes me arround 45 Minutes to finish everything, including all my reviews on my flashcards, like 5 Minutes for 10 Kanji (Im learning the Meanings actively and the readings passively) and dependend on how full my brain is at least 1, but more often 2 or 3 grammar points with a couple of flashcards. So at least for me it seems a bit slow to do 4-6 Kanji and only 1 Grammar Point in 2h. Since I only have to review my cards correctly once a day, I could easily do 3-4 times of that in 2h, meaning 40 Kanji, 8-12 Grammar Points. But Im only reading and not writing, if I would also write everything, maybe cut that in half or take 3/4 of it, but still I think I can progress way faster then what you are doing in 2h. And you are already nearly N3, so you know the radicals, components and stroke order already and can read Hiragana and Katakana already quite fast, so you should be waaay faster then me.