Having flown PT6 and RR Dart powered aeroplanes before it is not all that easy to 'milk' the start lever with the PT6 as it is with the Dart.
As for starting, be sure the battery is charged sufficiently after the first engine is started, before starting the second,
If generator assist is used during starting the second engine be aware that this sometimes is rather hard on the starter-generator shaft, due to the large amp draw...better to start the second engine just with the ships battery, or expernal power, if available.
Starter-generators are not exactly cheap.
