I need help with my monorail station for StarCraft II project

I’m drowning in ideas right now, but I dont know how to craft them in 3D because I just started this week. If you feel like helping me finish my project please feel free to do so. I’m not planning anything ambitious. I just need a simple monorail station for the map I’m working on starcraft 2.

Monorail Station .blend (782.9 KB)

Something like this:
https://www.google.com/search?q=monorail+station&espv=2&biw=1536&bih=783&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjVhbDxu_vJAhVG3GMKHW_qCAsQ_AUIBygC#imgrc=W04qtTsfAkhJrM%3A

or this

https://www.google.com/search?q=monorail+station&espv=2&biw=1536&bih=783&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjVhbDxu_vJAhVG3GMKHW_qCAsQ_AUIBygC#imgrc=HxAfdNYK11cAOM%3A

I also uploaded a file that I started today, You can either continue it or start from the scratch,

Thanks!