Check out my ArtStation: https://www.artstation.com/viktorfrankling
Great tutorial from Max Hay on making buildings: https://www.youtube.com/watch?v=jVEuwz1yI0A&t=1554s
LED signs: https://drive.google.com/drive/folders/1gVnfZNrHNx3YRDOy9RZVVWXWl5BRXsnw?usp=sharing