Regarding morse I learnt it years ago using the G4FON Koch Method Morse Trainer; fantastic method of learning since you don't get the 13WPM plateau you get with many other methods. Might not be a problem if you only use morse for navaids but if you've any interest in ham radio or whatever well worth it (well it's free) IMO. Knowing morse does make a difference I think; far easier to listen and say that's [whatever] than to have to check the dots and dashes on the plate... especially when you're in a massive rush outbound from an NDB to start an approach. Not that I ever did that. I'm just saying like...!
for the software I've used FS 2004 a bit since passing my IR to stay on top of some of the basics of an approach. The problem is getting something with a similar instrument panel to what you'll actually use as well as something with similar flight characteristics in terms of potential approach speeds etc. I'm sure that even with something pretty far off if you can get used to getting your scan going, like someone said practising straight and level, rate 1 turns etc, that's got to help. I've not used RANT myself but I know a gent who did and passed well so may be worth considering too. Good luck with the course. B****y hard work but some of the best most fun flying I've ever done too. Enjoy!!