If you are planning on moving to FS2024, you might not want to spend too much time searching for the holy grail of perfect settings, as FS2024 is very likely to move the goalposts.
Developer mode has a useful “FPS counter”, which will help you identify whether the CPU or GPU is causing a bottleneck and then follow the guidance on which MSFS settings are most likely to to help with a CPU- or GPU-locked system.
[HOW-TO] Graphics Settings and Performance Guide (SU12 Update) (7/26/2023) - Community Content Hangar / Community Guides - Microsoft Flight Simulator Forums should be a good start.
Your chosen settings will ultimately be a trade-off between quality and performance and that is always likely to be a largely subjective call.