Blender is a powerful open-source software package for 3d modelling for video games and animated movies.
Being open-source means that it is free to download and use on your own devices.
The interface didn't change much between version 2.8 and now so old tutorials from version 2.8+ are all still OK.
From SRCoder. Very basic tutorial for object mode modelling. A good place to start.
A bit longer tutorial but covers a lot of stuff including materials and textures and it's up to date with Blender 4.
A comprehensive tutorial for complete beginners that covers everything. You get to make that sword!
Blender 2.8 Shortcuts
In-depth learn how to make low poly assets in Blender
Default Cube Owl
Low Poly Animals
Realistic Hammer
Low Poly Character
RPG graphics - Humanoid
Texture Painting
A series of videos that gets progressively harder that challenges you to make something by yourself before learning how he did it.
Exporting From Blender 2.8 to Unity3d
Year 11
At this stage it is highly discouraged to use texturing, animation and sculpting
Year 12
Begin texturing, animating, and sculpting
Year 13
GO NUTS!