I started learning Blender this monday and I've done this so far (besides messing around with other minor models):
Day 2 - Low Poly Rocket Launch (based on the big course from here): https://drakenreiter.artstation.com/projects/eaxnd3
Day 4 - Sci-Fi Crate (based on the "Modeling a Sci-Fi Crate" lesson): https://drakenreiter.artstation.com/projects/8e1Jdq
Hope it's ok posting external links instead of uploading here, easier to post multiple things.