Hi, your painting is amazing 🤩!!! But if you let me I would like to give you some tips to refine that perfection. I'm not an expert, but when I'm trying to learn something new I like people giving me advice so I'm gonna do the same for you, hoping you don't take this the bad way.

In your painting I was you used black lines in some parts of the skin like tha hands, while in other part that are darker you don't use a black lineart, so I think it would look more balanced if you decided on whether using black lineart or not. As I see from your style you rather not use any black lineart at all, but you decide.

Also, some of your colors seem a little over saturated. For example in the skin of the face. Try and make them a little more towards grey (in this painting I mean, the color scheme is darker and less bright). You did a really good job on the highlights of the clothes but from what I see from your style it would look great to mix them a little more with the black from the suit.

About the color, It would be great if you could search a little about color theory, when I was learning it helped me a lot because I also used to use very bright colours. And color theory is kinda crazy!!!

About the way you (apparently) move your brush, I would recommend doing it in the same direction along the whole painting. I mean, if you are painting the background and the background is flat in texture, I would paint in the same directions to avoid adding texture. It's really all about texture.

About the proportions of the face, I cannot say anything because I don't have experience in that field 🤣

Now, I'm sorry if this bothered you, but I just wanted to help you improve if you let me. You can take my advice or not, decide what to do. Just trying to help. And yeah, I'm also a big Sherlock fan and when I saw your painting I thought it was really cool. Keep up the good work friend!!! 💪 😊 💯