It was sort of said above by @Gr3yGh057 , but I want to make it explicit here…
A laptop 1660TI is NOT the same as a desktop 1660TI (or any laptop graphics processor compared to its desktop companion for that matter. A laptop RTX3080 is not the same as a desktop RTX3080), so be careful what you compare your performance too. I’m assuming @MSFSRonS 's system is a desktop system as opposed to a laptop, so his graphics card will be more powerful than yours. I don’t know the specifics on the differences. In any event, as was noted, you won’t be able to reach his performance.
At the same time, it probably is a good idea to increase your ram to 24GB if that’s as high as it goes.
As was also said elsewhere, 32GB is a good amount to have if you can get there.