Check out Bunpro for Grammar SRS with structure and a great community possibly.
Otherwise there are plenty of good youtube channels that teach from the ground up as well, if thats more your thing.
Get into immersion as early as possible even if it seems daunting and you dont understand very much - it makes a hell of a difference. Graded Readers, NHK Easy, Yuyos Podcast on Youtube, Slice of Life Manga for an younger audience etc.
I am not a fan of core vocab decks at all. Can work for some and be useful, but I like the immersion-based approach more- you pick up what you need as you progress. Sure, at the start those are most/tons of words you will need to look up, but will get less. Especially as the super basic words repeat so often, immersion will work as an SRS without you actively putting them in one.
Also another reason for sth. like Bunpro- their very own Bunpro Grammar order builds their example sentences based on all prior Bunpro lessons. So if you follow their order the sentences will get progressively more advanced and priorly learned grammar points end up being reinforced in all following lessons examples. (And you will automatically learn lots of basic words in those examples)
Satori Reader is also cool I guess.
And really lots of other stuff.
It also depends on what you wanna focus on first. Eg. I dont live in Japan and never will, at most visiting/having some friends. My priority has always been reading and listening comprehension all the way back to 2011 when I first picked up JP. Speaking/Writing comes after for me.
Now if you need to learn speaking fast I definitely recommend getting either a teacher to correct mistakes and help you along so you avoid developing bad habits or finding Japanese natives on italki or similar sites to help you out on your journey, while you possibly help them with a bit of English in return.
I have been there and tried Genki and co. and while textbooks like that surely are good, its too stiff for me. Bunpro is more flexible and I like their own explanations + additional resources if needed. Nowadays I would at most recommend a Textbook alongside such sites like Bunpro to get another perspective maybe.
Edit: Also dw too much when learning grammar about getting the nuances / understanding everything that is taught to you. See textbooks, apps, websites, channels that teach you grammar just as a “tool”. You want to recognize the grammar point in the wild and have a rough idea what it is about. As you read and hear more and see it in different constructions you will get a better understanding of it.
There is a hell of a difference between recognizing a grammar point and reinforcing what you read/getting a clearer picture and encountering a grammar point without knowing it beforehand at all or possibly without recognizing it is one at all.
Learning resources are to get you started and give you all the means you need to start understanding a language- nothing more and nothing less. I feel thats a mistake many people tend to make while sticking too much to “cramming vocab, grammar, Kanji” etc. and avoiding immersion far too long