I had to ask because you made the idea of instrument flying in a helicopter seems very straightforward, even without a decent instrument fit - I wouldn't want less experienced pilots to think it is easy and chance their arm in marginal conditions.
I have flown IFR in a completely unstabilised single (military) and a number of full IFR twins - as much as the automatics will help you, they will only do so if you press the right buttons at the right time and know what to expect from the aircraft when you do press those buttons.
There is no substitute for a good IF scan and that has to be learned and practised regularly.