I have quite a few LazyVim plugins, but this simple keymapping makes my life much easier:

vim.keymap.set({ "n", "i" }, "<F2>", '<esc><esc>yy:r!<c-r>"')

I type a command, like ls, on a line and hit <F2>. That line is copied, executed, and the output is read into the buffer just below it.

I use it for all sorts of tasks, from listing open PRs with gh to fetching website text with w3m. It has significantly improved my workflow, allowing me to use the shell effectively within textual notebooks.