What amp wattage for my electric guitar is best for practicing in my room without anybody else needing to hear me?

For practicing in your room without disturbing others, you generally don't need a high-wattage amplifier. A low to medium-wattage one should suffice for bedroom practice. Here are some guidelines to consider:

 

5-10 Watts: Amplifiers in this range are generally suitable for bedroom practice. They provide enough volume for personal practice without being too loud to disturb others. These amps usually have headphone jacks, which can be useful for silent practice too!

Solid-State vs. Tube: Solid-state amplifiers tend to be more affordable and offer built-in effects, making them great for beginners. Tube amplifiers, while more expensive, often provide warmer and more responsive tones, but they may not have as many features for practicing quietly.

Modeling Amps: A modeling amplifier, which digitally emulates various amplifier types and effects, often come with headphone outputs and volume controls, allowing you to practice silently while still enjoying a variety of tones.

Compact Size: Look for compact amplifiers that won't take up too much space in your room. Many low-wattage practice amps are designed with portability and space-saving in mind.

Built-in Features: Some amplifiers come with built-in effects, such as reverb and delay, which can enhance your practice experience without the need for additional pedals.

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Overall, a low-wattage amplifier in the range of 5-10 watts, preferably with headphone output and built-in effects, would be ideal for practicing in your room without disturbing others. Make sure to test out different amplifiers to find one that suits your playing style and preferences.