Yes, assuming this is major to minor. For emerging from a junction you should ideally not leave any room for anything to sneak up the inside. I'd agree with your instructor. I'd change this to enter, signal, lifesafe right, turn I'd only life safe left if changing lane, but it also depends on the exact layout of the roundabout. The above would be my default starting point though. Just my opinion, but I hope it helps. Although it was a very long time ago, I was taught to always perform a lifesaver when turning left in case a cyclist or such like jumped off a curb to go through the junction.