Hentailolico has a great highlighted section of doujin to check out and grab.
I also recommend the classic Crayon Arts collective of Alice Kindergarten + Kikurage.
A new 8Chan Toddler Board is up for now. Nozomi has a great gallery as does ATF for CG Art. Tbib too! Check out CG artist names on this thread and fee free to add any missing. Here’s a search result from Tsumino.
There is also sadpanda, pixiv and nijie usually with the tag ペド
Of course obtain the 10 issue Enjeru Series that started Toddlercon off with a bang.