Littlehaven is your town your Sim lives in. One of the first people you get introduced to is Bella Goth. She helps you along your journey in the beginning. Also she is one of your neighbors. To add neighbors, to your town, you must invite them. Just like in the Sims, there are townies/NPCs, that are mainly people who help you in quests.
Currently in Littlehaven, you cannot zoom out see your town. You can't also free roam around your town neither head to community lots, not yet. The home you live in a is limited to around 24 x 30 (when fully expanded) on the lot, just like some lots in the Sims.