Well you know they always say you get used to something with practise, Lotty.
Do let us know how you go on. You should maybe take a snap of your gnashers now and again in a couple of weeks/month so that you can compare (you don't have to show us).
My Mum has a tendency to suffer with mouth ulcers a couple of times a year and I have heard coconut oil mouth pulling, because of the antiseptic quality of the oil, can work really well in preventing these.
If nothing else, Lotty, you will have the cleanest, oiliest, nuttiest-flavour gob in your neck of the woods.