Watercolor Portrait, Pinterest Photography

Perhaps I am very rusty in the use of watercolors, because I feel that in this portrait I had many errors, can you help me find them?

Hello friends, today I want to show you my latest watercolor work. How many of my followers know, before the pandemic I belonged to a group of watercolorists in my city, due to the virus, we have not met again for many months so I have also lost the motivation to paint.
But yesterday I decided to paint again and I saw this image on the internet

My procedure was the same but as you can see, it seems that I did not try much with the sketch, or I tried but I did not see the errors at this point
For this I used a 2b pencil

And watercolor

I liked the window and the wall, although in perspective it doesn't look very good. The man's hand looks very strange, in the photograph too, but in the drawing it looks very very strange.

Anyway. Everything is learning, I'll keep trying