My study log has a list of (some of) the grammar resources I use. (Some that aren’t included are Tobira, Sou Matome, etc. But they wouldn’t be that useful for a beginner anyway).
I recommend starting off by going through a chapter of Tae Kim’s Grammar Guide every night before bed. That’s what I did and it was the first time I started learning grammar properly after wading through that slog otherwise known as Genki. (No offence to any Genki fans 
).
Consistency is key, and whatever you do, make sure that you apply it in reading, writing, listening, etc.