update: updated readme

README.md

@@ -103,7 +103,20 @@ For detailed info, refer to this project [subject](docs/en.subject.pdf).
 
 ### Basic Usage
 
-INSTRUCTIONS
+1. **Execute the shell**
+
+```bash
+./minishell
+```
+
+2. **Interact with it like if it was bash**
+```bash
+echo "Hello, World!"
+...
+cat groceries.txt | grep tomatoes
+...
+echo "Greetings $USER!" > greetings.txt
+```
 
 ## 📏 Norminette