...I would really love to have the batteries sit on the charger 24/7 ready to go
Doing that with a LiPo battery will quickly kill it ...
Below is how you do it ... & if you quickly want to be airborne with all your gear charged you instead buy a charger that can charge all your batteries in parallel (like this one -->
Amazon.com: Hanatora Battery Home Charger & Car Charger for DJI Mavic 2 Zoom/Pro and Remote Controller,5 in 1 Rapid Charging Hub with Charging, Discharging and Storage: Electronics ) in approx 1 hour you have 4 batteries + RC fully charged (from storage voltage) & ready to go.
...Never keep the battery cell voltage outside 3,7-3,8v for a longer period than 48h (that is a battery charged to approx 50%). If too high after a flight, discharge them, too low charge them up to storage level again.
...Store them in room temperature ... (too warm is more damaging than too cold)
...Never let them overheat ... (left in the sun or thrown in a hot car)
...Don't charge them hot, let them cool down to room temperature
...Don't use cold batteries, try to have them at room temperature before using them
...Respect the operational ambient temperature specified in the user manual
...Don't push the battery for amp draw (both sticks on max inputs at the same time in Sport mode) when cold or hot ambient temps
...Don't fly them below 15% other in exceptional cases
...Always start a day of flying with the batteries freshly fully charged