Added a copypaste from stackoverflow that stops vim from waiting for extra keystrokes folloine Esc keypresses, so that it doesn't hang momentarity going from insert -> command mode.

.vim/plugins.vim

@@ -7,6 +7,9 @@ call plug#begin('~/.vim/plugged')
 "Plug 'tpope/vim-surround'
 
 
+" Line numbers
+Plug 'myusuf3/numbers.vim'
+
 " File explorer window
 Plug 'scrooloose/nerdtree'
 

.vimrc

@@ -1,6 +1,8 @@
 color desert
 syntax on
 
+set tabstop=8 softtabstop=0 expandtab shiftwidth=4 smarttab
+
 so ~/.vim/plugins.vim
 set splitbelow
 
@@ -37,3 +39,13 @@ set hidden
 nnoremap <C-N> :bnext<CR>
 nnoremap <C-P> :bprev<CR>
 
+" leave insert mode quickly
+if ! has('gui_running')
+    set ttimeoutlen=10
+    augroup FastEscape
+        autocmd!
+        au InsertEnter * set timeoutlen=0
+        au InsertLeave * set timeoutlen=1000
+    augroup END
+endif
+