I won’t correct everything I find wrong, but I felt that the “Understanding Suffering” section was completely off. I will just mention one of the major points:
Remember, enlightenment means that you no longer experience emotional pain as aversive. In other words, you continue to have “negative” emotions like fear, anger, jealousy, and so on—you just don’t mind having them.
This is utterly wrong. Enlightenment in Buddhism means emotional pain cannot arise, period. In Buddhism, there are five “hindrances” or negative mental states: desire, aversion, compulsion/agitation, slothfulness and remorse. This list is said to encapsulate all possible negative feelings. In an enlightened person, these hindrances cannot arise. The “fetter”, the bond which causes a person to experience these is uprooted.
Secondly, in Buddhism, it’s believed that negative mental states are always a bad and painful experience so it’s impossible to not mind having them. If you think about it, you can’t be sad and not mind it. You can’t be angry but not mind it. There are a few Buddhist circles which believe you can be detached from anger or desire, but this doesn’t make sense because in Buddhist theory, such mental states arise from attachment in the first place.
Based on the link, it seems you follow the Theravada tradition. The ideas you give go against the Theravada ideas. You need to go study the Pali Canon. This information is all wrong I’m afraid. I won’t talk more on the matter.