why not try aperture mode first? Using a DSLR does not mean u have to be using manual mode all the time especially when u are just starting out. Aperture/Shutter mode can teach u on wat aperture to use depending on the light availability.
Apologies if Im too blunt on the sunset pic above. Colors and contrast are flat, the foreground are too dark, there's no clear subject on what u want to achieve. U may want to read more about exposure and composition in order to improve on the pics. Photgraphy is not about inputting certain settings to get the pics that u want because that will NOT work. Practice, practice and more practice. Good luck