The online kidlit community is friendly, but where/how do you join in? One great way to start is to share your work. Even if you don’t blog, you can participate on other people’s blogs. Almost every genre has some kind of weekly writing prompt. Find one and start writing/sharing! Read other people’s work and comment on it. Charles Waters, an actor and poet, did just this. When I first met Charles (online), he didn’t have any real online presence as a children’s writer/poet. But he started participating in online poetry prompts, and he was everywhere! He left enthusiastic comments. He shared poems. He read others’ work. Within a year or two, he started placing work into poetry anthologies, and I’m pretty sure he learned about those opportunities and built those relationships through his very smart online networking and work-sharing.
NOTE: Don’t share online work you hope to submit to print publishers. Online=published. But consider writing JUST to share. It sharpens your skills and enlarges your community.