Now that you have filled the engine with oil, put on the oil fill cap again and check again for leaks. Everything should be ready for a test run. Move the aircraft to a safe location and start it up and let it idle for a few minutes. If there are any abnormal engine readings or sounds different than before, immediately shut it down and inspect it. If all seems well after 5 minutes, shut down the engine, check for leaks, dip the oil level and confirm it is in the correct range.
If all really IS well, then proceed to the next step.