Hi Lillibet and welcome,
You'll certainly find lots of help on here.
Reading other's threads will give you some insight into what to expect and there is so much advice.
What BeckyJan suggests is good. If you can get your Mum used to having someone call on her regularly, like an Admiral Nurse or a Crossroads Carer, it will help later when she may need more help.
It's always good to alert Social Services in her area as they can regularly assess her level of risk and it will help put your mind at rest that someone else is involved in her care.
Do you have no family at all in her area or old friends who would look in on her just occasionally? Sorry, I know you say she has no social network. Has she only recently moved there?
Maggie