I'd say the most important part is reading! Early on you'll get into a routine with grammar guides and Anki, and reading will seem intimidating. You'll want to push it for later, and the longer you take to start reading, the harder it is to finally take the plunge; at first it'll feel like you're looking up every single word in the text, but if you stick with it, it does get easier. Try to go for easy stuff on the beginning, but also stuff that you enjoy (some people recommend Hanahira for early reading, but I found it quite boring and had a hard time pushing myself to finish it when I read it; ended up a bit demotivated after that lol)
For grammar, I think
yoku.bi is very nice for beginners, as it has simple language and you can read a few rules per day (but do try to look at multiple sources, and maybe even some grammar dictionaries if you're having trouble with anything). Good luck on your learning! ;)