And I thought it was me trying to help you! By walking you gently through the basics.
I understand how greenhouse gases trap heat, as do all other scientists, whether they be physicists, chemists or biologists. The mechanism is well known. I also believe that scientists know how to very accurately measure surface and ocean temperatures in reproducible ways. I know less about the geologic record, but I was quoting from NASA.
Putting it all together. I believe the earth is warming. I believe the rate of warming is many times faster than at any other time in the millions of years for which we have geologic records. I believe that means it is extremely likely to have a human cause. And I believe that greenhouse gases are almost certainly the reason for this human cause.
It is warming, yes, measured ovet a period of time to date. I'm glad.