docs: improve CONTRIBUTING.md (#65)

CONTRIBUTING.md

@@ -20,14 +20,32 @@
 # Contributing
 
 ## Get Started
+This is a Rust project, so [rustup](https://rustup.rs/) is a great place to start. It provides an easy way to manage your Rust installation and toolchains.
 
-This is a Rust project, so [rustup](https://rustup.rs/) is the best place to start.
+This is a pure Rust project, so only `cargo` is needed. Here are some common commands to get you started:
+- `cargo check`: Analyze the current package and report errors. This is a quick way to catch any obvious issues without a full compilation.
+- `cargo fmt`: Format the current code according to the Rust style guidelines. This helps maintain a consistent code style throughout the project.
+- `cargo build`: Compile the current package. This will build the project and generate executable binaries if applicable.
+- `cargo clippy`: Catch common mistakes and improve code quality. Clippy provides a set of lints that can help you write better Rust code.
+- `cargo test`: Run unit tests. This will execute all the tests defined in the project to ensure the functionality is correct.
+- `cargo bench`: Run benchmark tests. This is useful for measuring the performance of specific parts of the code.
 
-This is a pure rust project, so only `cargo` is needed.
+### Setting up the Development Environment
+1. Install Rust using `rustup`. Follow the instructions on the [rustup website](https://rustup.rs/) to install Rust on your system.
+2. Clone the repository to your local machine.
+3. Navigate to the project directory.
 
-- `cargo check` to analyze the current package and report errors.
-- `cargo fmt` to format the current code.
-- `cargo build` to compile the current package.
-- `cargo clippy` to catch common mistakes and improve code.
-- `cargo test` to run unit tests.
-- `cargo bench` to run benchmark tests.
+### Making Changes
+1. Create a new branch for your changes. This helps keep your work separate from the main development branch and makes it easier to review and merge your changes.
+2. Make your changes and ensure that the code still compiles and passes all tests. Use the commands mentioned above to check for errors and run tests.
+3. Format your code using `cargo fmt` to ensure consistency with the project's code style.
+
+### Submitting Changes
+1. Once you are satisfied with your changes, push your branch to the remote repository.
+2. Open a pull request on the project's GitHub page. Provide a clear description of your changes and why they are necessary.
+3. Wait for reviews and address any feedback. Once the pull request is approved and merged, your changes will be part of the project.
+
+### Read the design docs 
+For a deeper understanding of the project, read the design documentation available on our [Paimon official website](https://paimon.apache.org/).
+
+Thank you for contributing to this project! 😊