This weird looking channel it’s doing some heavy lifting in terms of making grammar structure clearer.
She’s doing a series from scratch this days, and I think it’s tremendously useful to get things right from the start; you could watch the videos following along with any resource.
About Japanese the Manga Way. It’s a terrific resource, specially if you plan to actually read manga or dissect anime dialogues. Among the same lines (and also somewhat of a by-product of the Mangajin Magazine) there’s this:
Finally, I would recommend this as a reference guide.
Side by side with the Dictionary of Japanese Grammar (Basic(Intermediate/Advanced) it’s a cheaper, even more comprehensive, and overall a terrific resource for solving even those obscure gammatical terms you may encounter: