Hi, Low Radiation - I got PPL about 5 yrs ago and started training for IMC, when I realised that I might as well go for Night at the same time and save 3 hrs on the IMC Training. It's worth trying to do your IMC in a fairly continuous block, as I had several breaks in mine and 3 years on, still haven't passed my test (long story, but not helped by skills perishing in meantime!!).
I used Thom Vol 5 and the IMC Confuser for mine, which meant that I passed my exam first time.
I MUST complete my IMC!
I MUST complete my IMC!
I MUST complete my IMC!
I MUST complete my IMC!
I MUST complete my IMC!
....etc!