docs: add Mermaid-based visual learning roadmaps

README.md

@@ -34,6 +34,52 @@ Many students face unclear notes, messy resources or overly technical explanatio
 Ideal for first-year and second-year CSE students, or anyone learning CS fundamentals.
 
 
+## 📚 Visual Learning Roadmaps
+
+To help new learners understand the recommended learning sequence, the following diagrams provide a visual overview of semester progression, subject dependencies, and the relationship between core Computer Science subjects.
+
+### 🎓 Semester Progression
+
+```mermaid
+flowchart LR
+    S1["Semester 1"] --> S2["Semester 2"]
+    S2 --> S3["Semester 3"]
+    S3 --> S4["Semester 4"]
+```
+
+### 📖 Recommended Study Order
+
+```mermaid
+flowchart TD
+    A["Programming Fundamentals"] --> B["Data Structures"]
+    B --> C["Algorithms"]
+    C --> D["Database Management Systems (DBMS)"]
+    D --> E["Operating Systems"]
+    E --> F["Computer Networks"]
+```
+
+### 🔗 Subject Prerequisites
+
+```mermaid
+flowchart LR
+    PF["Programming Fundamentals"] --> DSA["Data Structures"]
+    DSA --> ALG["Algorithms"]
+    DSA --> DBMS["DBMS"]
+    DSA --> OS["Operating Systems"]
+    OS --> CN["Computer Networks"]
+```
+### 🌐 Relationships Between Core Subjects
+
+```mermaid
+flowchart TD
+    DSA["Data Structures"] --> CP["Problem Solving & Competitive Programming"]
+    DBMS["DBMS"] --> Backend["Backend Development"]
+    OS["Operating Systems"] --> Systems["System Programming"]
+    CN["Computer Networks"] --> Cloud["Cloud Computing & Distributed Systems"]
+```
+> **Note:**  
+> These roadmaps present a recommended learning path. Depending on your university curriculum, the sequence may vary slightly.
+
 ## 🤝 Contributing
 
 Contributions of all kinds are welcome!