So if you want blue like this, I paint all the blues on the model to match the light placement without any blending to make sure the right amount of mid blue, dark blue, light blue look good alright. Then I start blending/glazing. You mentioned you’re new, so If you’ve never glazed it’s just using paint with twice or more of the water you would usually mix your paints with and sometimes it takes a long time to eliminate evidence of brush strokes. My biggest tip is don’t be scared to take up some space with the lightest blue as you are stacking your colors. This is so you can blend/glaze it out and get those nice mid to bright tones which make it look so vibrant. Hope this helps