I did just that before starting my TR on the A320 and it didn't make a huge amount of difference. It can't really hurt, but it's also expensive in comparison to what you are likely to achieve in terms of instrument scanning.
My suggestion for a cheaper and more effective practice would be to spend some time flying SID and STAR charts on MS Flight Sim. While doing this practice your briefings with internet ATC chatter in the background and as many distractions as possible.
If you can play around with an FMGC simulator in your flight sim package and get quite comfortable with programming it and using it, that will really help too!
Good luck & enjoy your course!