There 2 methods for sperm donation: Natural-mating method and Syringe method. You can choose a method as you like.
You and me, Kyusuke, have natural mating (have normal sex) in a city hotel. This method is natural one, so it is easier to be pregnant than syringe method. However, if you have hesitation to do this method, I recommend you to choose syringe method.
I give you a syringe (without a needle) filled with sperm. I use a syringe kit sold in this website (in Japanese). Syringe method require less physical and mental cost. You bring it your home, insert the syringe into your vagina and insert sperm into your womb.