CB ESA & VOLUNTARY WORK

Hi all, hope you can answer my query. I have been on CB new style esa support group since Sept 23 for health reasons. I have good days and bad days but daily life is so unpredictable. I am isolated and lonely , having worked all my life I am finding not being in a work environment really difficult and affecting my mental health.
I became a self employed admin clerk and had a few clients until i became unwell, naturally they had to replace me , as long term i became unreliable. I would like to do about 4 hours a week voluntary work, but have read that if i inform the DWP of this change, my ESA would be stopped. please advise what i should do. I dont want to be dishonest, I am actually quite scared of doing the wrong thing and getting in trouble. I am 64 and never had any experience of claiming benefits , how others cope with the rules and hoops of this system is beyond me. Its incredibly stressful. Thankyou

Hi David, I havent ever been in contact with job centre plus before. This is all very confusing for me. I currently have a longterm health problem and I was awarded the ESA via being given a support worker through macmillan, who assisted me in applying. I dont even know what job centre plus is . please help