Tania is a talented writer and illustrator. She is also a magic fairy who has developed a bunch of useful guides for writers and illustrators. Check out her Fantastical Flying Creator e-book and The Happy Book podcast.
The AWC provides any number of writing courses with reputable tutors. On line courses are available too. I highly recommend anything taught by Sue Whiting or Kate Forsyth.
Every state has their own Writer's Centres. They are great resources for information and workshops.
If you are a children's writer or illustrator, the Society of Children's Book Writers and Illustrators is your home. Join them as soon as you can for support, guidance and general happiness.