Hi Suzie,
What a loving gesture that you are concerned for your Ash! They're very lucky to have such a considerate and caring owner ❤️
Due to your lack of contact with family and friends I also would recommend you contact a rescue centre, if you are in the UK then I would check out some of the charities that specialise in pet care after an owner's death. Battersea's Forever Loved Service is really good as the team at Battersea will give dogs and cats veterinary care at the shelter, looking after them there until they find a safe and happy home.
By contacting charities now you will be able to specify your requirements for the new home as you knew your dog better than anyone so can record your wishes and even set aside some money should you wish for the new family to buy some treats to ease the transition!
All the best ❤️