Some tips when taking the oil filter cap off ( or a spin on oil filter on other cars. ) Sometimes tapping the filter cap socket on helps to ensure full engagement.

Use a T handle, the will place pure torque on the cap rather than a partial torque and bending motion. This bending motion tends to jam threads making it more difficult to remove things.

If you don't have a T handle, user a medium length extension and hold the extension to counter the bending motion. ( If you are pulling the ratchet, push the extension. )

Apply steady torque not a jerking motion as the o ring needs to slide as the cap is rotated. Just let things slide along at their own pace.

The filter housing does have a drain valve that opens once the filter element is removed.

Look for a part number on the dip stick and confirm it is correct for the car.