The KiCad PCB tool shows a stack of colored selectors. Tom already mentioned Edge.Cuts and you should draw that as the first step of your design plan. Even a cheap PCB has two layers and you should mind which layer is selected during the layout preocess. There are layers for adding silkscren text which you can use for PCB name and version. Good luck.
It seems common for many DIYers to forget to add mounting holes too. Those are usually the first to go in when I lay out a board.The thing that irritates me most is that i so often forget to include the name of the project and date.
Tom