Art Hub for kids is a great source to help your child build confidence in drawing. They have different levels of complexity and a huge library of projects to choose from. He even has e-books you can download so that you can even have kids learn to draw off-line or even on a plane ride or road trip. If you wanted to expand your child's creativity, you can also have them write a story about the character they draw. My students favorite time of the week was when we would pull up a video on Art Hub to draw a character, usually one we have been featuring in our reading for the week. Then they would put some sort of writing with their art and it would be posted up on the wall all week. This works for fiction or non-fiction books. If we read a non fiction book about spiders, we would watch his video on a spider (the detailed one), and they would label their drawing with the parts of a spider and write three facts they learned about spiders. If we read the fiction story about Akiak we would watch his video on drawing huskies and they would write a short paragraph describing character traits of Akiak. Students loved it! For the summer you could even take a couple blank pieces of paper and fold them in half, staple the side with the fold and make a little book for them to write a whole story about their drawing that they could draw on the cover of their book.
https://www.youtube.com/channel/UC5XMF3Inoi8R9nSI8ChOsdQ