Worry about the tour and race bike later.
Look for a real commuter like a used 3 speed Pashley Princess. Once a year maintenance. Lube the chain and ride. The trucks can see you and you don't need to shift gears every 10 seconds. Sure they start slower, but can coast 4 blocks up to red lights. Shift to 1st when you stop, simple.
You need finicky triple deraillers like a hole in the head.