that all sounds good to me! i don't think i'll be able to do the star at the fingertip, since i don't think there's a way i could execute it well with the limited frames i have in clip studio paint ^^; the head tilt and ear twitch are absolutely doable, though!
as for the pop of color- have you got a color in mind, or are you alright with anything?
for price, based on the complexity + what you'd like included, i'll quote $22 ($15 for the base, $5 for animation, $2 added because that sort of lighting is a little bit more complex)! if you could go ahead and DM me your paypal email, i'll send an invoice over and get started as soon as it's paid!