Not really sure where to start, need help..

Alright here's where I am at right now

Pulled plugs and wires, doused with penetration oil, am now able to grab the fan by the blades and spin counter clockwise. It has a bit of resistance while turning.

Not sure if my battery is good atm so I can't crank from key, but I do hear a whine, like an alternator charge when spinning blade.

What's next? Change oil? New battery? Change plugs?