For first-time readers, how is your grammar?
We’re at the point where if you are lacking in grammar, you really want to open those text books and start reading up on grammar.
It’s important to know basic grammar, but it’s just as important to at least be aware of it.
Knowing of something makes it easier to learn later on because you’ll already have a foothold for making a connection when you encounter it in reading.
I’m a fan of Cure Dolly’s subtitled Japanese From Scratch video series. If you watch one video per day starting today, you can watch 21 videos by the time we start reading. (Videos are 10 to 20 minutes long, typically on the shorter side.)
Alternatively, Tae Kim’s grammar guide combines mini videos with text material. Go through one lesson each day, and you’ll complete the “Basic Grammar” portion before we start reading. (You can give the exercises a try, but don’t hesitate to skip over them.)
Elsewise, if you have a textbook, and if the chapters are short enough, read through one per day. If a bit longer, read half a chapter per day. Even at the slower pace, it’s possible to get through Genki 1 in a few weeks.
Remember, you don’t need to understand all the concepts just yet.
You want to encounter them and have at least a vague concept of them.
Once you see them in the wild (reading manga in our case), it becomes easier to learn them because you’ve seen them before. You’re giving your brain’s ability at pattern recognition a head start.
You won’t remember all the grammar you’re seeing in advance of our start date, and that’s okay. The important thing is that you’re exposing yourself to enough grammar that you will recognize some of it when you see it in reading, and that’s enough to help with the learning process later.