[JSF95]

Hello all,
Just picked a 986 that has been sitting for about 9 months (outside unfortunately). Previous owner said it was running fine when he parked it last summer, with the occasional CEL for a misfire that he thought was an injector going bad.****
After putting a new battery in, the car starts but idles pretty rough and the CEL flashes after running for a couple seconds. Will be getting a OBD reader from work on monday, but thought I would see what steps you all suggested for essentially restarting a car after 9 months.
What I have planned so far mechanically wise:

Clean MAF (airbox looked brand new)
Drain as much old fuel as possible, put in fresh 93 octane
Replace fuel filter
Pull packs and plugs to get a look at them (supposedly new in 2022)
Pull codes and diagnose misfire (assuming injector, bad fuel, Cam sensor, or MAF)
After sorting misfire, change oil, coolant.****
Power steering fluid and brake fluid looked ok for now but will eventually replace.****

What else am I missing?****

Thanks****