My experience from learning from childrens books has not been very good. They tend to be quite whimsical, which is hard to follow, use quite old language, which

My experience from learning from childrens books has not been very good. They tend to be quite whimsical, which is hard to follow, use quite old language, which is hard to follow, and use really child-appropriate language, which is hard to follow. Getting to a middle-school or YA level though, and increasing through reading levels there, is probably the best thing you can do for your language (and phrasing was built specifically to make this level accessible to you before your language level is high enough). PS: Childrens books work on Phrasing too, so this isn't inherently biased in that respect, just my genuine opinion.