Once you start getting orders, you can see them as soon as you logged in into the dashboard. Your dashboard only shows orders of the day. To change to other dates, choose the dropdown next to Dashboard word, which by default is showing Today. If you have multiple outlets, you can choose to only display order of that outlet.
You can also search past or future orders by going to the search form, and typing the search query. The dashboard also auto-refresh every few minutes, so you can just keep the tab open in your shop.