What do you hope to discuss here? I see just only common words in the article.
Yes, the angiotensin-converting enzyme was found as the receptor for Covid19.
Yes it can be a target for some drugs.
Yes this protein of virus spikes can be potential vaccine (as natural one as recombinant analogue).
But we know only few really efficacy low molecular weight anti-viral drugs. All of them are result of many-years work and a big luck. We have to be ready to spend 3-5 years for development pro-drug panel , 3-5 years for screening the panel, 3-5 years for laboratory studies, 1 year for preclinic study, 2 years for clinical trials. And this is very optimistic estimate.
Other hand we know relative fast and most efficacy techniques:
development of vaccines (both inactivated virus and recombinant proteins based),
development of specific immunoglobulin (both from human blood and recombinant monoclonal).
These ways are long too but they have more predictable results.