Good luck Tan! We did this a few weeks ago and my kids handled it better than I thought they would DS (who's 25mths) had a little trouble for about a week going to bed at night and found it hard to settle, it was taking us up to an hour sometimes a bit more to get him down, but he wouldn't cry or anything, just fluff about for ever! DD is not having ehr day sleeps every day (maybe 3/7days she will sleep), but will sit quietly on the lounge and watch tv for an hour or so, so I'm happy with that, she's 3 1/2 now so big enough not to have one. Night times were no trouble at all surprisingly.
You can do it and so can Izzy! She will probably surprise you. Good luck, I have everything crossed for a smooth transition!!