macos – From vim to nvim LazyVim – plugins help needed

moving from my vim setup to LazyVim I have troubles to setup some plugins. Most important would be a working plugin for surround like mini-surround, vim-surround (which I am used to) or nvim-surround. Here my tree – the plugins with _out I am unable to load. I did not change any files from LazyVim starting packages.

.config/nvim $ tree
.
├── LICENSE
├── README.md
├── filter
│   ├── many_perl_text_filters.pl
│  ...
├── init.lua
├── lazy-lock.json
├── lazyvim.json
├── lua
│   ├── config
│   │   ├── autocmds.lua
│   │   ├── keymaps.lua
│   │   ├── lazy.lua
│   │   └── options.lua
│   └── plugins
│       ├── colorscheme_out
│       ├── devicons.lua
│       ├── example.lua
│       ├── gruvbox.lua
│       ├── md-preview_out
│       ├── mini-surround_out
│       ├── mini.nvim_out
│       ├── nord-theme_out
│       ├── nvim-surround_out
│       ├── telekasten_out
│       ├── telescope_out
│       ├── treesitter.lua
│       └── vim-surround_out
├── stylua.toml
└── test.md

What I understood so far: nvim/init.lua calls lua/lazy.lua calls all plugins in folder plugins. Ok my naive questions:

I need a clear colorscheme; I never understood the nerdy dark mode. But I am unable to activate it. For gruvbox plugin I tried many variants. Actually I have:

return {
  -- from https://www.lazyvim.org/plugins/colorscheme
  -- added on 2024-08-11
  -- add gruvbox
  { "ellisonleao/gruvbox.nvim" },
  priority = 1000,
  opts = {
    colorscheme = "gruvbox",
    -- style = "day", -- not working
    -- background = "light", -- not working either
  },
}

or in lua/lazy.lua I tried with vim.o.background = "light" which is working, but disables the colorscheme of gruvbox.

Error activating this plugins/gruvbox.lua config:

Failed to load `plugins.gruvbox`

~/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/fragments.lua:109: attempt to call method 'find' (a nil value)

# stacktrace:
  - lua/config/lazy.lua:20
  - init.lua:5

Now surround, which is my very question:

To make it not too long, what is in my file plugins/nvim-surround.lua:

return {
  -- new test on 2024-08-14
  -- not working
  "kylechui/nvim-surround",
  version = "*",
  event = "VeryLazy",
  config = function()
    require("nvim-surround").setup({
      -- Configuration here, or leave empty to use defaults
    })
  end,
}

Here no start error. LazyVim says, loaded and “already up to date”, but the shortcuts are not working.

I am manly using vim for LaTeX and mixed Markdown-Files, to produce books with pandoc or XeLaTeX

Is there a guide or process to help with this specific migration?