At this point I'm more concerned with what you said about the chapters being 100 pages long, as a manga. The only manga I've read with chapters close to that long is Beck. They were maybe 80 pages, give or take. Unless you have people helping you, a ton of time, and a place to work, this will be a massive undertaking. Finishing a 100 page chapter takes more effort than dividing them up in 20 page ones. It's going to take you much longer to put out a chapter, which can lead to a lack of satisfaction and sense of progress. I recommend you go for a more standard chapter length. 100 pages is simply too much to handle unless you're a seasoned professional.