Your house is found on the middle of the ranch, near the plort market. By pressing the interact key (normally "E", and "X" on Xbox), you can go inside it, however it is currently just an image that changes with current in-game time. It also has an animation of Beatrix LeBeau While you are in your house, a radio nearby will play some catchy tunes that change with the current in-game hour. There are several options when you enter your house:
7Zee Rewards Club
StarMail is a feature in the game that allows NPCs to give you tips and information. It can also tell you if there is a new upgrade for you Vacpack.
As of version 0.5.1, you receive "Letters from Home", letters that expand on the lore of the game.
Sleep Until Morning
Fast forwards you to the next morning (between 6:00 and 6:30AM). After you sleep, a roostro will be heard to announce the new morning. All events such as plort production or garden growth will advance with the player, so it's a good idea to make sure everything is how it should be before sleeping.
Return to Ranch
This makes you exit your house and places you outside the door.