Just YouTube the balljoint installing tool. Its very easy, but recommend if you have one use an air compressor. Using a socket on it gets tiring quick. The biggest thing is just make sure the balljoint is going back into the control arm straight, and it will go right in.
What kind of balljoints did you buy? If they are OEM then you dont need to grease them, but if they are aftermarket then they should have included the grease fitting with it, so you can add a "little" grease to it. There is no need to pack the crap out of it.