Use a pencil to roughly sketch out your drawing first - just in case!
Comic artists often have to draw the same characters lots of times, so it's good to have a routine way to draw so they always look the same. Start with the face (because it's the most important part) and work your way out.
Angel face has a cute innocent look but is really quite sneaky and smart. A couple of well placed eyebrows can give her that crafty look that shows off her cheeky side!
(She's also very smart - so make sure you give her a big enough head for all those brains!!)
Never worry about messing up - just give it another go! The more times you draw, the better and faster you'll get at it!