For linux you can just run

curl -s https://raw.githubusercontent.com/warehouse-13/a-new-hope/main/install.sh | bash -s

if you like.

Install required packages

Mac

brew install python3 python@2 neovim
pip install neovim
pip3 install neovim

Linux

sudo apt-get install neovim python2 python3
pip install neovim --user
pip3 install neovim --user

Clone the repo

git clone https://github.com/warehouse-13/a-new-hope ~/.config/nvim

Install the plugins and binaries

nvim --headless +PlugInstall +PlugUpdate +GoUpdateBinaries +qall
nvim --headless +UpdateRemotePlugins +qall

Start NeoVim

nvim <filename>
# or
nvim .
# or
nvim

Once you have opened NeoVim, if you see errors it is possible the headless install did not work. Without closing NeoVim, type :PlugInstall and enter, followed by :UpdateRemotePlugins and enter. If you get further errors, try completely uninstalling and then reinstalling Python, Python3, Pip, and Pip3.