Our old (2006) minivan has an electronic adjustor, so I just hold that down while getting in (butt in seat, press button, swing legs). Our other car (2007 sedan) is even easier, since I just tap the adjustment bar under the seat and it slides back as I’m sitting on it (again, sideways). Then I adjust the shoulder seat-belt just before grabbing the belt to buckle, then I adjust the rear-view mirror while checking as I back up. It’s pretty smooth and routine.
Our AC takes a while to turn on anyway, so I don’t expect any AC until I’m at least a mile or so down the road. We park in the shade (garage at home and work), so I don’t need the AC anyway when setting out.