Sorry to say Lisajb that you probably will not get a letter.
Letters being sent to people to completely isolate for 12 weeks are for the following groups, on the whole -
Those who have received organ transplants, are living with severe respiratory conditions such as cystic fibrosis and severe chronic bronchitis (COPD) or specific cancers like of the blood or bone marrow. And some – though not all – of those receiving certain types of drug treatments including ones which suppress the immune system – leaving the body less able to fight off the virus.
My husband and I are both over 70 with underlying health conditions, but don't expect to get a letter. We are lucky in some ways that we can keep away from everyone else, and don't have to go to work.
If you have to share a computer, could you use it for a few hours after thoroughly cleaning it, then the other person, or are you likely to be sharing it all the time?
Keep safe.
Regards Margaret