AWS: Convert t1.micro (PV) to t2.medium (HVM)

I have t1.micro (PV) and I am trying to update (resize) to t2.medium (HVM).

However, when I created AMI from t1.micro and tried to attach to t2.medium, I did not get instance under list. So could not attached AMI to t2.medium.

So may I know how can I attached AMI to new instance from EC2 Console? Also, how can I take care of SSH , SSL , Cron , multi domains while migrating?

Resource I refereed: http://ift.tt/1EujmCb

Thanks