Oil on top of the engine, replace oil fill cap gasket. Wicked cheap. Might just replace the valve cover gasket while you’re at it. If it’s like a modern one at all, it might be filling your spark plug holes with oil, and leaking on the outside.

The cooling fan should only run if it’s too hot for the thermostat to keep the engine cool.

If it just never runs, in that, it could be anything. Coolant temp sensor (does the gauge move?), relay, or wiring, OR the fan itself.