Newbie! Ttc! Help

Sarah
Hi all,
Recently started ttc with the hubby and have a few questions. How long do I need to lay horizontal after he ejaculates? Any tips or techniques to keep it in? How long does it need to stay in there? What if I have to pee? When should I shower? Sorry for all these questions! Just need some advise from some women in the same boat as me. Thanks ladies! Baby dust to all! 
Sarah