Yes, that's all correct except you're forgetting one thing. The 6 steps you went through account four about 1.2C warming of the earth per doubling of CO2, which is nothing to worry about. To get beyond that you need to add a lot of more steps to your 6, such as increasing water vapor increases heat trapping clouds.... etc. etc. etc.
That's where it's not so simple, and you really baffle me as how you haven't learned that is the steps 6 through 300 leads profit (armageddon) that others have problems with. Really, you seem to have a basic grasp of what's going on, how do you keep missing this simple fact?