vim neovim
~/.vim/ ~/.config/nvim/
~/.vimrc ~/.config/nvim/init.vim (or `init.lua)

In order to make neovim load your vim configs:

" ~/.config/nvim/init.vim
set runtimepath+=~/.vim,~/.vim/after
set packpath+=~/.vim
source ~/.vimrc

I've noticed in the neovim documentation :help clipboard that xsel is mentioned as a "newer alternative to xclip"

" since I have xclip installed, this is
" enough to nvim talk with the system clipboard
set clipboard+=unnamedplus

init.lua loading .vimrc

vim.cmd('source ~/.vimrc')

NeoVim from Scratch