Jennie Louise Wright

Hi everyone, I'd love some advice about moving back to the UK after living in Australia for 27yrs yet am still home sick. I have 2 daughters aged 6 and 14 and I realise that I have to get permission from their father to attain passports for them as i'm a single mum. What I'm needing to know is how long do you have to be living in the UK before your allowed any help from the UK government treat you like a British citizen again and allowe you to access all government help etc .... Also , i realise that I'll have to get myself a job asap, but does it cost anything for me to put my girls in school or to see a doctor when sick ? Is it possible for me to move back With my girls comfortably or not ... its quite a scary thought but something that I've been thinking about for years now. Any help or advice please ... i was hoping to move to the UK for Christmas 2016 but need to make sure me and my 2 girls will be ok. Thankyou for reading...