The first thing we would recommend is that you put a plastic sheet on the floor, followed by a couple of old towels. This will prevent you from getting the floor dirty or damaging it. Also, you must open a few windows for proper ventilation.
You can check if your oven has a self-cleaning option if so, set you oven to that function. If it is the first time, you used this function; it is best to check your oven's manual. Using this function will make your life a lot easier.