📃 docs: write setup docs in readme

Author: kylesinlynn

README.md

@@ -1,5 +1,38 @@
-# Changing plymouth theme on linux
+# Plymouth Theme Changer for Linux
+This script has been made due to personal needs whilst customizing `GNU/Linux` distro which I use.
 
-## Installation process
-- Download the file and run setup.sh
-- Run plymouth-theme to change plymouth theme!
+- [Plymouth Theme Changer for Linux](#plymouth-theme-changer-for-linux)
+- [Setup](#setup)
+- [Troubleshooting](#troubleshooting)
+- [Contributing](#contributing)
+- [License](#license)
+
+# Setup
+1. clone the git repository
+   ```bash
+   git clone https://github.com/kylesinlynn/change-plymouth-theme-bash.git
+   ```
+
+2. move into the cloned directory
+   ```bash
+   cd change-plymouth-theme-bash
+   ```
+
+3. run the setup script `setup.sh`
+   ```bash
+   bash setup.sh
+   ```
+
+4. try using the command `plymouth-theme`
+   ```bash
+   plymouth-theme
+   ```
+
+# Troubleshooting
+Create an issue upon your error that is associated with this project.
+
+# Contributing
+Feel free to fork and create pull requests. Your contribution will be appreciated.
+
+# License
+This project is licensed under [BSD License](LICENSE).