You poor girl, I had a lump in my throat when I was reading your comments.
What you describe is the overwhelming grind of having RA, the absolute despair that it can take us to.
You perfectly describe your experience of loss - loss of employment, loss of health, loss of energy, loss of interest, of liveliness, of
friendships, of standards we once took for granted. Where you are is in a state of bereavement for everything that was - we mourn

Treat yourself as a person experiencing bereavement, Google it, read about it, anything that will give you insight into how to start looking after yourself.
Do other chronic health sufferers feel like this? - I don't really know but like you I have always been energised, full of go, planning ahead etc. RA has taken me into
that dark place and brought me to the point of despair. Please be assured that the people you find on this forum will nurture and support you, they will look out for your
blogs and will respond wholeheartedly. They will never tire of you, I know that from experience and you will find that out for yourself.
It's good to hear you do have a plan though - building back your mobility, losing weight, taking an interest in yourself again. Speak with your GP or Practice nurse, see
what they have to offer, it's always helpful to have a partnership in your plans. Ask your doctor about exercise on prescription, it's available and might be
just what you need, or go to your local leisure centre and find out what's on offer. A little activity will increase those endorphin's and in doing so you will start to feel more energised.
Please keep posting - we will keep reading and replying.
Gogs