Add some short installation and usage instructions

README.md

@@ -5,6 +5,31 @@ Tools for building Pyodide.
 See [http://github.com/pyodide/pyodide](http://github.com/pyodide/pyodide) for
 more information.
 
+## Quickstart
+
+### Usage
+
+> [!TIP]
+> Currently, installing `pyodide-build` is the recommended to use it, instead of running it directly.
+
+#### Install it
+
+```bash
+pip install pyodide-build  # in an environment
+pipx install --include-deps pyodide-build  # globally
+```
+
+> [!NOTE]
+> Currently `pyodide-build` does not work well in virtual environments managed by `uv`, see #58.
+
+#### or run it
+
+- with `uv`/`uvx`
+
+```bash
+uvx --from pyodide-cli --with pyodide-build pyodide --help
+```
+
 ## License
 
 Pyodide uses the [Mozilla Public License Version