Well Soulless_Body, I think kang have said what I wanted to tell you. You can always use a pencil and draw out the image that you want in a sketch then ink up the picture then remove your pencil sketch with a erasier.
Well I think this is the best way to do your inking as you can amend any error in your drawing during the process. If you would to use a pen a draw straight away, you can\'t make much correction to the picture if there were any error.
Ya and what Kang says is correct, practice more and also see more pictures of what others have done. It works for me so I think it will work for you too.
