lighting - How can I create this 'medieval look' using an entry-level camera like the Nikon D3300?

How do recreate pictures like the ones below?

They all appear to be lit a certain way. The colors are all very similar, with an overall dark, brooding aspect to them. The backgrounds are heavily blurred.

I am an amateur photographer just starting out, and I own a Nikon D3300 with the 18-55mm kit lens.

^{Editor's note: I've attempted to reverse-search these images to credit the source, but can find no trace other than self-referential.}