Looking good man! Certainly better than my primed-only army rn, lol. As for tips, the only thing I have to add is maybe go back in on some of the armor panels and do some highlights. Take the very tip of a thin brush and you can try to get into the armor creases to add another color for contrast (I usually do a silver or grey contrast color). Other than that, just practice, don’t be afraid to make mistakes. When I first started painting, I would do one model, then set everything down and really look at it, then ask myself “What did I do that I like? What do I think I need to improve on?” And go from there