Make sure the case is in good condition. Dispose of it if there are any cracks or flaws. I mentioned the hand primer as a 'Nice to Have' item because most single stage presses will come with a repriming accessory. With a hand press, you can prime your brass in your easy chair inside where it's warm. It is important to have eye and ear protection at this point, and please don't look down into the case while pressing the primer home.
Primers contain lead styphanate, which is an explosive.
You would be suprised how much fire comes out of one primer and how far it spits out. This uses the second die, the one that has the opening in the middle. This flares the case mouth to make bullet seating easier. If you have the kind of die that allows you to, you can dump your powder down thru the die and into the case at this time while you're belling it. There are two different ways of doing this, by ladle or measure.