Let me know if you want me to modify anything!
Here are a few variations:
"Hey! I'm really excited to see your comic work, especially since we've been friends since childhood. Your creativity and talent have always impressed me. If you're looking for feedback or just want to share your latest project, I'm here to support you. What's your comic about? I'd love to take a look and offer any suggestions or encouragement I can." my childhood friend xter comic work