How do you configure which-keys when not using lazy.vim?

[doublethefish]

I want to disable icons but I am unsure of how to set opts.icons.mapping = false in my init.lua or .vimrc (I'm oldskool).

I've tried:

-- init.lua
require'which-key'.setup{
    icons = {
        mappings = false,
    },
}

But that gives module 'which-keys' not found: so I am probably missing something obvious.

[Folaht]

I would like to know as well,
because I don't want to start which-key
with the key usually already set for 'next word'.

I'm using rocks.nvim and I get an error message saying
Invalid 'str': Expected lua string

/home/bas/.config/nvim/plugin/keymanual/init.lua

local config = {
  keys = {
    {
      "<leader>?",
      function()
        require("which-key").show({ global = false })
      end,
      desc = "Buffer Local Keymaps (which-key)",
    },
  },
}

require('which-key').setup(config)

~/.config/nvim/rocks.toml

[plugins]
"rocks.nvim" = "2.42.2"
"which-key.nvim" = "3.13.3"
...

[folke]

Without lazy, you just use vim.keymap.set?