There is a difference between a flight simulator and a flight training device.
In my opinion, there is nothing to be gained by swapping time in the helicopter you are training, for time in an FTD. I'm not aware of a simulator for an R22, but simulators cost so much to run that the only benefit gained is in practicing drills that you could not (or would not) simulate in the aircraft (EOL's in ME aircraft, ditching etc.). Save time - and money - and continue learning the procedures applicable to the type that you're learning in. Hovering, by the way, isn't that difficult - it only seems impossible at first - you'll be surprised at how soon it all 'clicks' into place.