Just to remember where things are in my neovim installation in MacOS:

" Configuration file
~/.config/nvim/init.vim

" Using vim-plug for managing plugins
~.local/share/nvim/site/autoload
" Location of plugins
~/.local/share/nvim/plugged

The init file follows the structure presented in here: https://github.com/junegunn/vim-plug pointing to the location of the plugins as:

call plug#begin('~/.local/share/nvim/plugged')