I think this largely comes down to what kind of learning style you prefer. Genki is a traditional textbook, so you probably have a rough idea what it’s going to be like – a bunch of chapters which each introduce a grammar structure or two, some vocabulary structured around a topic area, exercises to reinforce the grammar, and so on. Bunpro is a grammar SRS, so it’s not trying to be an all round resource and it’s going to get you to do reviews to get you to learn things. (Somebody who’s used it can give you a better idea here.) Some people like textbooks, and some people really hate them. The other advantage of a textbook is it’s a one off cost rather than an ongoing subscription.
A few adventurous people like to dive straight into native material super early and look up all the grammar and vocab as they go along. Personally I think this is like swimming the English Channel in December – bravo if that’s what you really want to do and what motivates you, but there are more pleasant ways to get from Dover to Calais…
Yes I agree with this as there will always be some pros and cons to the resource you use. Also thanks for providing information on each material, much appreciated!
If you’re very motivated, but not necessarily crazy about Japanese, you can achieve ~N3 within a year.
You can do Genki 1+2 within like 3 months (which is N4) and spend the rest on bringing up your kanji/grammar/listening skills up to N3 level. The requirements aren’t exactly that high.
Side note - I like the same oshi and welcome you to our vTuber thread
to all the lovely comments here I’d just add, find something (reading, podcast, tutor, speaking practice) to do with Japanese that is connected to your primary goals and do that alongside WK and the grammar. Make it simple - search the forums for the easiest way to start the one you choose and work your way up gradually. It will just make everything else you learn so much more meaningful, and it will increase your motivation to put in the time consistently on kanji and grammar. Because above all else, consistency is what will get you to your goal. And if you’re having fun and stay connected to your end goal / dream, you’ll keep it up.
That’s the advice I wish I had had and had taken 7 years ago when I started.
I did manage 0-n3 in two years, but that was very ギリギリ and it was while I was living in Japan.
I wish I had made more notes as to how I actually studied at the time, I honestly can’t even remember. I don’t think it was as effective as I would want though, looking back
Thank you so much for the advice as well! I will add this along the list of other advice from this thread 
Not sure what ichimi is, tho