For practical IFR flying no-one uses anything other than GPS and DME though the ability to track a VOR is very useful in learning some of the skills needed to fly an ILS.
So go and get your IMCR it'll be some of the most enjoyable flying you ever do and one day it will save your bacon. Before I had a full IR I was caught out by unexpected bad weather in Germany and was able to to divert and fly an approach to land without drama. No-one asked me whether the skills were legal in Germany and if they had my response would have been to make a Mayday call!