Architecture exterior Help!!

Hey, guys so basically i just barely learned Ue4 like past 2 days… and i came up with this… I know it looks really bad, but i really need help on it… Since i need portfolio for my university application… :frowning: please look at the picture and the example picture
… so you guys can explain to me how i can make it better.
Here are the links to the picture
The one i made
and this one how i want my to be :"(
Please any help would be appreciated since i have make designs for my portfolio and i recently started liking Architecture more than anything.