Where can I see my P&L?

You can see you P&L in the "Account View" window in the "Positions" tab. There you see all your current and past positions for the day. Please right click on the name of any of the current columns in the "Positions" tab and click on "column chooser". You can add or remove the columns for your P&L including "Total P&L", "Unrealized P&L", "Realized P&L" etc.