I think the IMC is a very good introduction to the IR training. Although not as in-depth, it is a good starting point to give an insight into what is to come and allow you to get some experience with some of the basics.
I am at a similar stage and am about to start the IMC in preparation for the IR. Having asked around on this myself, the overwhelming opinion is that the IR is probably the hardest thing to pass, and a first time pass is important when seeking that elusive first job. The IMC is a great way to give yourself every opportunity of achieving that, as well as improving your flying skills at the same time.
Besides it's a good way to build hours and experience so why not give it a go ?
best of luck
NH
