Regarding the source of the initial infection there is irreconcilably conflicting data. Reports from mid-October in Eastern Canada report a novel Coronavirus of ~35kb size was in the wild. This strongly suggests SARS2 was circulating in the wild long before it hit Wuhan.

However, as I noted here, the Wuhan Institute of Virology is shown to have been engaged in the gain of function research on bat Coronavirii immediately prior to the outbreak there, and is smack dab in the outbreak epicenter. It's hard to dismiss all the many circumstantial indications WIV leaked the virus.

However, presently the threat of the virus and totalitarian governmental oppression that is the response to it simply make it's origin of negligible import in comparison. Further, it's going to be impossible, absent confession by perps (which will be impossible once they have been 'retired' in the traditional, extremely prejudicial, manner), to prove it's origin.

Focus instead on implementing plans A - D for surviving the initial 2 month quarantine, and the subsequent aftermaths as most probable per your considerations, is my advice.

Good luck, and looking forward to seeing you on the flip side.