There are organizational problems with the tree and outline. There are two issues I want you to think more about when making trees.
First, (usually) siblings should be parallel. This means that all nodes with the same parent should be the same kind/type of thing. They should all fit into the same category (the category is indicated by the parent). They should all be the same in some way.
For example, if the parent node is fruit, the siblings could be apples, oranges, plums and peaches. Those are all the same kind or type of thing (fruit), and they fit into the category (fruit) indicated by the parent.
Second, what is the relationship between the parent and the child? If the relationship is the same every time, then the siblings will be parallel. But if the relationship varies, then the siblings may not be parallel, and you may also get some other problems. You can write out, as an English sentence, the relationship between a parent and child, or why the child goes under that parent, or something along those lines. (Similarly, when reading a tree, including reviewing your own tree, you should be able to think of those relationship sentences. If you can’t, then the tree is wrong or you don’t understand it well enough.)
For example, “an apple is a type of a fruit” is a sentence explaining the relationship between the parent node “fruit” and its child node “apple”. This is a simple relationship, but other times the sentence will be a bit more complicated and involve some other notable words. Here, the only words in the sentence are basically generic filler or glue words that you would use for many other topics (an, is, a, of, a), plus the exact words in the parent and child (fruit, apple), plus one more word, “type” (which, along with “kind” and “category”, is one of the typical words for writing a relationship sentences).
Try remaking the chapter 1 tree using these ideas. 20-90min. If that sounds hard, practice them with some smaller, simpler trees first.