Hi@akhtar,
You can find one keyword --query in your AWS CLI. This keyword allows you to find particular values. You can use the blow given example. It will find all the InstacncId and ImageId. You can get a better understanding with the AWS Cloud Migration Training.
C:\Users\NADIM AKTHAR>aws ec2 describe-instances --query Reservations[*].Instances[*].[InstanceId,ImageId]
[
[
[
"i-06e0d316abeb7fca4",
"ami-0447a12f28fddb066"
]
],
[
[
"i-0995dbee8a1dd7169",
"ami-0447a12f28fddb066"
]
]
]
Hope this will give you some idea.