Here you have symptoms of pain at feet, arch of feet and heal level after sitting for short or long duratiin and then when you attempt to walk. Similarly you also have same pain every day morning after you get up and walk.
This kind of symptoms are common with couple of causes like rhematoid
arthritis, calcium with vitamin D deficiency, or plantar facitis ( inflamation of plantar fascia ).
I suggest to visit orthopedic doctor for detail examination and evaluation. Here if rhematoid arthritis is positive then doctor will suggest for few medication for it and along with this doctor will suggest for
physiotherapy treatment. For any other issues also physiotherapy treatment will help you to get relief.
I suggest to use soft foot wear with in as well out side the house. There is also soft silicon insole available to use with in shoes.
You can also do hot water fomentation daily by deeping your leg in hot water.but keep it in floating position so that water can touch the painful sole area.
Also if you get diagnose with rhematoid arthritis I suggest to consult a dietician to take advice on anti inflammatory diet to follow it. As well also take advice from physio for few stretches and mobility exercises to follow regularly.
Here I have given you general guideline for your pain but I am sure this will be useful if you follow it properly.
Take care.