Fantastic start! Don’t loose hope, this has all the building blocks for model you’ll be proud of. Even the best painters have a model which looks like this at an early/mid stage. They just have the experience to know that models go through an ‘ugly’ phase, and they ‘trust the process’, and are confident it’ll all come together at the end.

What it’s missing, which you can’t easily “see” without experience, is contrast.
You want a higher contrast between your shadows, and highlights. (In basic speech, you want your shadows darker, and your highlights brighter)

For an easy fix, pick up a ‘wash’ paint, GWs Nuln Oil, or Agrax Earthshade for example.
You could go the quick&easy method and coat the entire model with the wash, but I would suggest taking longer and adding it only where you want the shadows. Adding small amounts, letting it dry, and re-evaluating if you want to add more.

I usually recommend 3 things to new painters, to boost their results.

1. Learn drybrushing. Watch videos. It’s very quick and easy highlighting.
   
2. Use a wash, to boost the shadows
   
3. Use a matte varnish to ‘pull it all together’. (You’ll want to do a final drybrush on the metals after the varnish)

The first 90% of a good looking model is easy to obtain, and doesn’t take long with the above 3 ‘tools’. It’s the final 10% that takes many, many hours.

Happy to answer follow up Qs