Guys my uncle tested positive for covid today

Guys my uncle tested positive for covid today with mild on and off fever and very mild cough .He is diabetic and hypertensive with H/o stenting 2 yrs back. He is already on anticoagulant therapy due to his history and diabetic medication . Vaccination done a month ago with two doses completed. Have already started on basic protocol since 3 days due to h/o contact . It is highly impossible to get him a bed now , so plz suggest the basic protocol investigations that He needs to get done?
Thank you!!