Congrats on doing something and accomplishing it! We all start somewhere, and your journey is just beginning. This scene is a good start, but here are some ideas to help improve it:
Overall, congrats on making something! Now, polish it up and on to the next challenge!
For you're first scene this is good. My very first models didn't had colors. Didn't knew how to do that so don't worry. In time you're gonna. Start making awesome models. You're on the right track
Cool, keep going!
Just one thing: get in the habit of naming your objects!!! Otherwise you'll very soon end up with scenes filled with Cube, ..., Cube.067, Cylinder, ..., Cylinder.011, etc. Then try to find something;)
Do this from the start, not when it gets confusing, even with simple scenes.
Good luck and have fun with your 3D journey; it's a hard road, it's a long road, but it's very satisfying. That's a promise!
Learning photography basics will help you better understand light, exposure and composition. It is almost always about creating an illusion for the viewer.