Hmm, perspective studies! Very, very good. We all need to that.
About the watercolour pieces, watch out for dirty colours. The green hair of the girl, for example, looks dirty and smudgy. Did you blend in some white in the hair's green colour? Because I do not recommend that. That will make the colour dim. Paint with clean colours! Instead of white (if you did use it), you could have blended in yellow to make the hair brighter.
Next, I would like to say something about the apple and the orange you painted in the first post. When you start the painting, first cover the canvas / paper with a base colour (de kaller det vel grunning på norsk, jeg vet ikke hva det heter på engelsk). That colour will shine through the painting you will add later, and prevents white areas around the objects. The way it is now, the colour of the table they are laying on is painted very hastily, and there are areas around the fruits that are almost free of paint.
I think a red colour, like the one you use on the table, would do a good base colour. Then when that is done, you paint the fruit over it. Just be careful so the fruit and the table don't have the same colour!
I sense that you like drawing characters. Continue with that! There is an endless world of possibilities when it comes to character design!