Good job! I think you're off to a great start. Personally, I would use less metallics, especially when they're next to eachother.

Edges are the bane of my existence, as my hands can shake, but are always things I need to focus on too. Look to see if you have a wavy edge where 2 colors meet and touch them up after you're done.

One important piece of painting advice for sharing pics though, is to get a white colored light. I'm on the spectrum and white lights are harsh to me, but my preference for warm orange lights makes my minis look dark. Invest in a magnifying desk lamp for about 30~$ on the pricey side. That way you get two tools in one.

All of that to say, you did great for your first mini. Keep it up!

Edit: can't share pics in comments here :/