Hey again, I don't think this post will be as helpful as the last one

I can't comment on the " Japanese, The Manga Way " book either as I have no experience of it nor have I seen it being mentioned for learning (so possibly may not be the best for learning)

With the Kanji, I can't comment on quite well as it's also somthing I don't have alot of experience with yet. Generally iv found that concensus is that it's good to learn your Kanji radicals when learning Kanji, but also your writing too (Get your Memory & Motor nerves running). Probably setting yourself up for say for example... 20 kanji a day, learning each Kanji's radical and then doing writing drills.

Again that is just an example but perhaps someone else may offer better insight into this!