You've got some interesting subjects, welcome to the forum!
The first one looks way too saturated, not sure if you did something in your photo editor software or not. Zoom in on some of the pillars, the colors are excellent. Fill the frame with your subject, make it simple for your viewers' eyes to find your intended subject in the photo!
The second one just looks out of focus, this is hard to do at night. Zoom in and focus manually on your subject and then zoom out and shoot - the lens will hold your focus. Try to get a fully centered view of your subject. When your film plane (in this case, digital sensor plane) is perfectly parallel with your subject you get straight lines and a great photo. Try standing directly in front of the building in the second shot.
Just in case you are - don't be afraid to try different ISO settings. Learn your new camera by taking some sample shots at different ISO's when you get to a scene and compare them when you get home. You might like a higher ISO better than 100. I love shooting in ISO 200 personally.
Keep it up!