dont rush. it's ok to rush a tiny bit at the begining, but at the end, take your time. it looks like you didn't get the details like body-panel gap, and smoothing, and the masking job, and the slight orange peel. just take your time, and it'll be fine. be careful with the sandpaper too. you'll want to use fine grit paper like 400 when you do the final shaping at the end so you don't take off too much and to ensure its smooth.
also, you'll want to wipe it with a damp paper towel or something (not wet, only damp enough to make dust stick!) before you paint it to take all the sanding dust off of it, and then air-dry. (or use a swiffer duster, lol) afterwards, paint, and allow for the flash times between coats
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