For those joining who are worried about whether you are ready for this - Doraemon is a pretty gentle manga, and as far as ABBC picks goes - we’re on the easier end, so this is a perfect manga for your first club. Check out this great article with tips on joining your first club. And for people who are more experienced readers - Doraemon is legend, so don’t let this one pass you by 
Some quick responses:
@andrewsouthpaw When you first start reading - it’s your grammar level that will probably be limiting, not kanji. Vocab is in between, but generally not a problem once you have elementary grammar down. Viridithon’s suggestion to check out the free preview pages is spot on. We start by reading about a page a day on average for reference. The whole first story is on the free preview I believe, so you could see how you do in the first week and decide after that.
If you’re not in Japan, then you need to complete purchases on Bookwalker’s webpage. But you can read purchased books from their mobile apps by logging in with the same account. Here is the iOS link