It's nice to you practicing but i would like to give a piece of advice.
Before trying to do armors,outfits or whatever try to follow an image as
reference, because when you dont have enough experience you will probably follow the wrong path.
I made an edit on this.
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Try also to understand
how the light works on different textures. Remember that metal shines and the light comes from the northwest.
Another thing, try
criticize yourself, take a look on what you are doing and think " this really look like what i'm trying to do? can I do better?"
If you realize at the end that does not like as you expected, erase and
do it again, and again and again until you reach good results.
That's it,
Keep going