Its a good start but I think you need to work more on the topology. You have a super lowpoly back (yellow) but lots of unnecessary edges along the side (red). This issue is present on most of the model, it should be easy to fix though
Think about how the edges affect the silhouette, if you can remove the edge without any change to the silhouette you should probably do so. If you removed all those unnecessary edges you could bevel corners and improve the shape without increasing the polycount.
The weathering/wear and tear effect on top felt a bit excessive imo (also I second that point that there are some edges/edge loops which serve no purpose)
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You have a super lowpoly back (yellow) but lots of unnecessary edges along the side (red). This issue is present on most of the model, it should be easy to fix though
Think about how the edges affect the silhouette, if you can remove the edge without any change to the silhouette you should probably do so. If you removed all those unnecessary edges you could bevel corners and improve the shape without increasing the polycount.
(also I second that point that there are some edges/edge loops which serve no purpose)