I hope this isn't annoying, but I have some quality of life tips that you may do with as you will.
The Pop! Shop is about to be replaced by the more stable COSMIC Store, which you should definitely install (from the Pop!_Shop) now.
If you've got an AMD GPU, the Kisak/Valve mesa drivers (https://launchpad.net/~kisak/+archive/ubuntu/kisak-mesa) are worth installing from PPA - but Pop is generally not great for older hardware, in my experience. There's a lot of focus on the new, because they primarily support their own OEM hardware.
The current churn of flaky Pop!_OS kernels that misbehaved on older hardware drove me nuts, so I switched to the XanMod kernel (https://xanmod.org/) for an instant performance boost.
I do still run it on older hardware, but it's more of a chore than it ought to be compared to some other options.