Ah the problem you have there is you have taken the image with a large light source behind you.
You should always make sure the bright light source is infront of you or to one side, that way you will light the subject (in this case you are the subject) as opposed to casting a shadow which you have done in the pic above.
The best thing about DSLR's are the trail and error benefits you have. Are you taking a lap top with you on your Honey Moon, if so you can upload all the images you take and free the card up for more pics.
One thing I would always advise is to take to many shots with different settings rather than one , if you use the camera screen to review the shot you cant be 100% certain the pic is a) Clear and not blurred, b) the right colour tones.
If you shoot in RAW Image setting the Image color tone is not so important as you can play around with this once the image is on the computer using the Darkroom software thats included.
RAW Will use a large amount of space on the memory cards, but well worth doing if you have the space.
If you have photoshop and you have taken a pic in standard LJPEG and it comes out Blue, you have the ability to adjust slightly but it may not be perfect.