Just my recommendation, finish at least Genki I and have that basic stuff under your belt without overwhelming yourself with too many other resources.
If you want to do manga, I would then consider picking up Japanese the Manga Way. It covers the same basic grammar as things like genki I & II but from the manga angle and gives examples from Japanese manga.
I personally did Japanese the Manga Way after finishing Japanese from Zero 1-4 (which is basically the equivalent of Genki I and II) and even though it has the same grammar points, there is a lot to learn from the manga dialogue type perspective and I found it pretty easy after already having the basic understanding from Japanese from Zero.
You can get practice from NHK Easy pretty early on, but that utilizes grammar a little different from manga (more formal, etc. ) but still good to reinforce things as you go.
I started reading manga around level 15 WK after finishing JFZ 1-4 and Japanese the Manga Way. Just regular manga I would normally read, not childrens or anything. There is still a learning curve, but my grammar was pretty good, it was the kanji I had to look up most.