How to install font in emacs?

Question

emacs

There is a font folder. Drag it to ~/.emacs.d. What to write in ~/.emacs.d/init.el to use this font in emacs. More precisely, I'm interested in how to set the path to the font: I don't want to install the font into the system, and then point to it in emacs. I want to set the path to the font in the init.el file and tell the editor to use this font. How to do it?
PS For example, the color-theme plugin is installed like this:

(add-to-list 'load-path "~/EmacsCasts/episode03/color-theme/")
(require 'color-theme)
(color-theme-initialize)
(setq color-theme-is-global t)

That is, the path to the plugin is first specified, and then the plugin is installed. The same should be done only for fonts.

Answer 1

set fonts