Welcome to CA.
You posted in the correct section...no problems there.
Now, as for crits, I'll offer just one for today...
I think you would do well to take up a study of linear perspective. It will help you to build objects and scenes that have a more convincing 3 dimensional structure. Bad perspective can really hurt an otherwise decent drawing.
Keep at it!
As the ego shrinks, so the spirit expands.
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