When I was younger I used to earn quite big money doing Caravaggio copies for rich collectionists.
Caravaggio is very pleasant to paint and copy. Not a long time ago I went to a friend painter'sa studio and he showed me a Caravaggio I did in his studio when I was young that I didn't even remembered but never been finished (the San Geronimo).
The painting was on wood and when I saw it I inmediatly realized that I would not been able now to re-do that or even finish it. It stayed as it was and it was the last copy of my life.
As a funny anecdote, when I was doing the Caravaggio copies, I had an enquiry for the police specialized in art and they first phoned me and then made sure that the formats I was using and techniques where clearly labeled copies. Actually, if you go to the Louvre and copy, they do not allow you to use the same dimensions and you are obliged to put "copy" on the canvas. At that time I was quite impressed and uncomfortable with this police enquiry on me because they where pretty serious and I was just having fun and making easy money.
He did used the camera obscura, that is admited, but you also might understand that at this level of painting techniques (they started very early) they could reproduce mentally the lightning they wanted to so it's not exactly using some tools and follow strict rational steps.
He didn't sketch, actually if you want to copy Caravaggio correctly you need to paint directly wich makes it harder, but in fact from a contemporary painter technique, Caravaggio is not the hardest painter to reproduce, it's almost brutal and basic (I'm strictly talking about technique here). A nowday kid with good hability and dedication would make it easy because we are faster, and we have heritate unconsciensly all the art history since there. A today's kid brain is way faster and efficient.
So you know Chris: put yourself in front of a canva and start so you can have one at home, but remember to put "copy".
Ps: oh yeah, I forgot: it's much (much much much) easier to copy Caravaggio than understanding the video codecs.