What about a tree with some randomness thrown in? Yes, both of those things would make better looking (more realistic) trees—but I'm going to leave that to you as a homework assignment.

This is quick tutorial to using Blender to model 3D low poly tree. Tutorial for step by step for beginner. Timestamp 00:00 Introduction 00:16 Create the Trunk 01:48 Create the Stump 03:04 Create Leafs ...