blow.n.gasket
What you missed is the fact that the Earth has an elliptical orbit and gets closer to the sun and further away in an annual cycle
In the Southern Hemisphere our summer coincides with earth's closest approach to the sun. Winter coincides with furthest away from the sun.
The Northern hemisphere is the opposite so Northern weather and climate is way reduced in range compared to Southern.
If you look at the solar 'forcings' in the Southern hemisphere they way exceed any CO2 forcings by order of magnitude - and that's over millenia scale.
So for an objective view check out Southern Hemisphere climate and weather changes and see whether that is anything to worry about (Melbourne excepted
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