Swapping the tired factory stereo for a modern Atoto A6 PF Android head unit might be the highest value-per-dollar upgrade you can do to an older car: CarPlay-style navigation, Bluetooth, backup cam input — all for a fraction of OEM prices.
This install uses a 3D-printed angled dash kit and hidden USB panel (both free STLs), plus an Axxess XSVI-9003 wiring interface from Crutchfield to keep everything plug-and-play. Links to all parts are in the YouTube description.