The "Oor Wullie" and Highland Cow statues outside the Huxley restaurant (across the street from the Johnnie Walker Experience on one side and the Caledonian Hotel on the other) is a great Central Place to start, but if it is a morning tour perhaps we can meet at your hotel if it is not too far away.
The tour winds up at St.Andrews Square, which is the other end of New Town from where we start. From there it is easy access to New Town, Old Town and tram stops.