You don't need any pictures of the lips or embouchure. Just put the mouthpiece on your lips. Say the letter "M" and blow easily. You also might try forming your lips like you would when you spit a seed out.
The only thing you need to worry about with mouthpiece placement it that there is an even amount of lips above and below. Make sure the rim rests on the white part above and belowe the lips not in the red.
Finally, get a teacher to help you!
Good luck.
Michael Anderson
International Trumpet Guild
http://www.trumpetguild.org