I had the opportunity to write a breakdown of my Unreal Projects, the Bird House and Stylized Landscape, which I made recently. Tried my best to summarize each aspect in bite-size portions.
The article is accessible on 80 Level's website, with additional videos: https://80.lv/articles/bird-house-working-on-a-stylized-landscape-in-ue4/

Full Projects can be viewed here:
https://www.artstation.com/artwork/yk4PbQ
https://www.artstation.com/artwork/mDW6Yd