docs: mention how to modify the keybind

README.md

@@ -1,4 +1,38 @@
+# Helix Notebook
+
+An interactive Python experience with Helix, the Kitty terminal and IPython.
+
+## Prerequisites
+
+- `uv` package manager
+- `kitty` terminal
+
+## Getting Started
+
+Install the dependencies
+
+```sh
+uv sync
+```
+
+Open a new kitty window
+
 ```sh
 kitty -o allow_remote_control=yes -o enabled_layouts=tall
+```
+
+Inside the new terminal create a split
+
+```sh
 kitty @ launch --title python --cwd=current --keep-focus uv run ipython
 ```
+
+Start working on a Python file!
+
+```sh
+hx my_notebook.py
+```
+
+Select some text with your mouse or the `x` key. Press `control` `r` to run it in IPython.
+
+You may change the `control` `r` keybind in the `.helix` directory in the repo.