Okay. The picture of your multimeter has the dial pointing to ACV. That's Alternating Current volts. No use to you for the car.
You mention you figured out how to test for continuity and that it makes the Noise. I assume you had the meter pointing to the bottom right 'continuity' function for your test. This will test if there is an electrical path available between whatever you touch the tester leads to. I would expect the noise in a normal motor when you touched the two connectors.
Next step is to try touching each connector with one tester lead and the other to a metal part on the motor while the multi meter is in 'continuity' mode. Normal motors won't beep.
The position next to OFF labeled DCV can be used to measure voltage. Try it on the battery. Red on the positive side and black on the negative. The battery will read around 12 volts. You can swap the leads and put the black on positive and red on negative and it will read a negative volt value. (It's not really negative volts, it's just indicating that the flow goes the other way).
With that done you can then use the leads to DCV test voltages at the various parts of your window setup. Including the connector for the motor. With a lead on each connector you can expect it to show no volts when at rest and around 12 volts when the window switch is in one position and negative 12 volts when it is in the other. Confirm this operation.