UNITY

THE KILLINGBECK/SMITH GUIDES

Part 1 – So You Wanna Use Unity Eh? (by C. Killingbeck)

Part 2 – Enter Blender (by C. Killingbeck)

Part 2B – Advanced Blender (by D. Smith)

Part 3 – Raycasting (by C. Killingbeck)

RESOURCES

Unity Documentation - https://docs.unity3d.com/Manual/index.html

Unity Forum - https://forum.unity.com/

Unity Asset Store - https://assetstore.unity.com/

Unity Learn - https://learn.unity.com/

Blender Documentation - https://docs.blender.org/

Blender forum - https://devtalk.blender.org/

Blender communities - https://www.blender.org/community/

NASA 3D models (not only useful for sci-fi projects) - https://nasa3d.arc.nasa.gov/models

There are also many Unity resources available on StackOverflow and other independent sites.