There are so many organisations that offer care during end of life, death and funeral planning. Where possible, go for the most specific support for your individual situation.
Start with www.thegoodgrieftrust.org this is an umbrella organisation that lists almost every support organisation in the UK.
Many will have a free helpline, some are 24hrs.
You can also contact your GP and make an appointment to discuss what help you may need. They may be able to refer you to something specific, but you will need to be realistic about potential waiting times.
Keep a list of things you need help with, and when someone offers, give them a task off your list, this can work well with sticky notes too.
Make up your personal list of contacts from professionals, organisations, friends etc. and keep it handy. Use this free download if it’s helpful, or the back of an envelope, but keep it safe.