First of all I'd like to say that it's really nice to have you in the game, and I hope you'll start feeling less shy as you get more comfortable with the character. Don't be afraid of commenting around/giving late replies - we're all here to roleplay, so we'll be happy for the chance of playing with you.
As for characterization, I think you're doing well so far. Post-angst Fye can easily turn into some generic (genuinely) happy guy, but I think you're doing a good job of balancing this calmer, more confident Fye without forgetting about his still-present silly, fun-loving side.