Why not start now? I went through Genki 1, but never did 2, and am managing to get through the first volume. have done other stuff though. Just more spread out and random than a coursebook. So no real idea how I compare to a Genki II doer.
I do agree with what others say, in that it starts out harder at first, then gets easier. First section where they just moved, was a bit of a struggle. But when the random girl says hi, and when Yotsuba doesn’t know how swings work, were much easier. (That’s as far as I’ve gotten) So, if you do decide to give it a go, don’t let the first dozen or so pages discourage you. Almost gave up myself, but glad I’m sticking with it now.