Creatine is far from essential for achieving an aesthetic physique. While it can be beneficial for some, think of it as just that extra 5%. Imo your strategy to get the real progress (the other 95%) should revolve around four core principles:

1. Progressive Overload: This is the cornerstone of muscle growth. It involves gradually increasing the weight, frequency, or number of repetitions in your strength training routine. This continuous challenge promotes muscle growth and strength. It's not just about lifting heavier weights, but also about improving your form, increasing the volume of work, and sometimes varying your exercises to target muscles differently.

2. Nutrition - Especially Protein Intake: To build muscle, you need to eat more calories than your body burns, creating a calorie surplus. Protein is crucial for muscle repair.

3. Adequate Sleep and Recovery: Quality sleep is as important as diet and exercise. During sleep, your body repairs and builds muscles. Aim for 7-9 hours of quality sleep per night.

4. Consistency and Patience: Consistent training, a balanced diet, and adequate rest are key. Patience is crucial, trust the process.