I don’t have any specific advice on Kanji. I went with Wanikani, stood with it almost to the very end (some 2000 kanji), and now I’m happy that it ended … not shure If I would do it again.
What I would do very similar is create a routine to add new vocab on a daily basis coming at first from your study material, and then progressively from your immersion. Make that vocab into SRS (and be constant with reviewing), Anki, Houhou, anyone actually… I would say Anki, because it offers much more room to improvement and adding interesting things as you progress, but honestly, key thing probably is just showing up.
When you hit a critical mass (500 words maybe for graded readers and then some 2000 words for super basic native content) pick a book and progressively it will start to feel like you finally have wheels and it things get smoother.
For shows, it really depends on how much you are ok with not understanding … there’s benefit, for parsing language first, recongnizing patters and words after, undertanding full dialogues later, and progressievely more and more. It’s not like watching in your own language, the objective it’s not the same.
You can try with dubbed material of content you’re familiar, if your fine with it, you know you have in your hands a terrific tool. If you’re not, then wait, and work on something else, comming back from time to time. There’s lots of material, eventually you’ll find something that it’s appealing and can serve as immersion.
Grammar, you can go through a textbook, read the explanations on Genki I, Tae Kim, or similar, get vocab from there at first too. Don’t be too obsessed with getting grammar by just reading about it, that will come when you start reading and immersing. And if you’re not assisting classes and are a self-learner drilling grammar don’t make much sense actually. Have a grammar reference book perhaps and consult it like you would do the dictionary when new grammar comes up after you have gone through a basic textbook.
Anyway, main thing I could recommend is aim at immersing ASAP. Read, shows, whatever floats your boat actually. A hobby, shure thing put it in … in japanese.
Anyway, it’s just the way I have thought about it since I started. I’m not taking JLPT exams, so It might as well be terrible advice if your aiming at that …