You've got a good handle on creating distinct voices, like the zombie noise. However, it's essential to remember that voice acting goes beyond just the voice itself. Don't forget to infuse your characters with a conversational feel and maintain a consistent level of enthusiasm. This script is about a product your character is genuinely excited to talk about, so ensure that excitement shines through in your delivery. Keep up the good work and keep working on infusing that enthusiasm into your characters! Also, your always welcome to upload if you like.