My eldest daughter (26)moved on her own to Sydney in January this year and has absolutely no regrets. I speak to her via Skype every week and ask her the same question , "any regrets?" and the answer is always "no".
She was originally living at a place called Dee Why near Manly but has now moved further out to Gosford on the central Coast about 50 miles from Sydney as rental property was half the price of that in the Sydney area. Fortunatley she works from home and only goes into the office one day a week, which is about 40 miles away.
Whilst in the uk she had got into Rugby League reffing and now does that in the central Coast area (kids and teenagers games). It's been useful as she has made friends through this. And despite being a "pommie" woman does not get much grief from the sidelines. Far less than in the uk she says.
When she went she said she would not come home for two years to get over the 'homesickness' although we are going out to see her in August for three weeks and whilst there will attend my nephews wedding, he's been over there in downtown Sydney for six years now.
One thing that has helped Lucy is that she has bnot made her home and her life a shrine to England. If you're going assimilate into their way of life rather than remaining an Englander abroad. The only time she is allowed to be English/ British is when we play them at Rugby League.!
Give it a go. I'm 57 now and wish I had had the balls to do it.