To achieve your goal of building muscle, you can follow a few key steps. First, make sure you are consuming enough calories to support muscle growth. Since your daily calorie intake is 2000, you may need to increase it slightly to provide your body with enough energy. Additionally, focus on consuming a balanced diet that includes a good mix of protein, carbohydrates, and healthy fats. As you mentioned, you are not restricted by any specific diet, so you have the flexibility to include a variety of foods in your meals.

Considering your preference for supplements, you can continue taking whey protein and creatine. These supplements can help support muscle recovery and growth.

In terms of exercise, it's important to incorporate both resistance training and cardiovascular exercises into your routine. Based on your weight of 68kg, height of 178cm, and goal to build muscle, I recommend the following resistance training exercises:

Squats: This exercise targets your lower body, including your quadriceps, hamstrings, and glutes. It helps build leg strength and overall muscle mass.

Bench Press: This exercise targets your chest, shoulders, and triceps. It helps build upper body strength and muscle mass.

Deadlifts: This exercise targets multiple muscle groups, including your back, glutes, and hamstrings. It helps build overall strength and muscle mass.

Overhead Press: This exercise targets your shoulders, triceps, and upper back. It helps build shoulder strength and muscle mass.

Pull-Ups: This exercise targets your back, biceps, and shoulders. It helps build upper body strength and muscle definition.

Remember to start with lighter weights and gradually increase the intensity as you progress. It's also important to maintain proper form and technique to prevent injuries. As for the number of sets for each exercise, I recommend starting with 3 sets of 8-12 repetitions for each exercise. However, it's important to listen to your body and adjust the number of sets and repetitions based on your individual fitness level and goals.

Lastly, ensure you are getting enough rest and sleep. Your body needs time to recover and repair the muscles after intense workouts.

Remember to listen to your body and make adjustments as needed. It's always a good idea to consult with a professional personal trainer or nutritionist who can provide personalized guidance based on your specific needs and goals.

Based on your goal of building muscle and the information you provided, I recommend the following number of sets for each exercise:

Squats: 3-4 sets
Bench Press: 3-4 sets
Deadlifts: 3-4 sets
Overhead Press: 3-4 sets
Pull-Ups: 3-4 sets

Remember to start with lighter weights and gradually increase the intensity as you progress. It's important to listen to your body and make adjustments as needed. If you have any specific concerns or limitations, please let me know.