I wrote this 18 months ago, but it has held up. The last part talks about how one might start a COVID origin investigation.
Jeremy Hammond has written a beautiful article about the reality of SARS-CoV-2 and viral isolation methods. He has a very good grasp of the details of viral isolation, for those who want to delve into this subject and improve their knowledge base.
Here is a description of its culture and isolation, with additional details in the supplementary materials, for those who continue to clamour for it.