I would like advice on my object Free 3D model

I would like advice on my object Free 3D model

cgtrader

This is for a school project and i was just wondering if this is decent for a junior in high school. Should this work be more detailed? What should i do to improve my modeling skillz. Im mostly looking for advice not to get recognition for this crappy gun creation. If i want to get a career into this genre of profession what should i do to try to make that possible? I want the truth mostly so if your reading this please help me out. Thank You.

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