Introduction:
Organic Chemistry is an important branch of chemistry that deals with the study of carbon compounds and their reactions. It is a subject that requires a strong foundation in the basic concepts of General Organic Chemistry (GOC). If you haven't studied GOC in class 11, it is essential to cover the basics before moving on to class 12 organic chemistry. Here's a step-by-step approach to help you start organic chemistry in class 12.

1. Review the Basics:
Start by reviewing the basic concepts of General Organic Chemistry (GOC) from class 11. This will include topics like IUPAC nomenclature, isomerism, hybridization, electronic effects, and acidity-basicity concepts. Use your class 11 textbooks or refer to reliable online resources like EduRev for comprehensive study materials and practice questions.

2. Understand Bonding in Organic Compounds:
Next, focus on understanding the bonding in organic compounds. Learn about sigma and pi bonds, resonance, and the concept of hybridization in carbon compounds. These concepts are fundamental to understanding the reactivity and properties of organic compounds.

3. Study Reaction Mechanisms:
Familiarize yourself with the different reaction mechanisms involved in organic chemistry. Start with the basics like substitution, addition, elimination, and rearrangement reactions. Understand the reaction mechanisms by studying the electron movement and the role of reactive intermediates like carbocations, carbanions, and free radicals.

4. Learn Organic Reaction Types:
Organic reactions can be classified into various types like oxidation-reduction, nucleophilic substitution, electrophilic addition, and elimination reactions. Study each type in detail, including the reaction conditions, mechanisms, and examples. Practice solving problems to gain proficiency in identifying reaction types.

5. Memorize Important Reactions and Reagents:
Memorize important organic reactions and the corresponding reagents. This will help you in solving reaction-based questions and predicting the products of reactions. Make flashcards or use mnemonic techniques to aid memorization.

6. Practice Problem Solving:
Regularly practice solving problems from textbooks, previous year question papers, and online resources. This will help you apply the concepts you have learned and improve your problem-solving skills. Analyze your mistakes and work on improving your understanding of the topics.

7. Seek Clarification:
If you come across any doubts or concepts that are difficult to understand, don't hesitate to seek clarification. Consult your teacher or refer to reliable online resources like EduRev, which provide detailed explanations and examples.

Conclusion:
Starting organic chemistry in class 12 without studying GOC in class 11 may seem challenging, but by following a systematic approach and dedicating sufficient time for self-study and practice, you can build a strong foundation in organic chemistry. Regular revision and solving a variety of problems will help you gain confidence and excel in this subject. Remember to stay focused, motivated, and persistent in your efforts.