Watercolor effect on picture + envelope liner adjustment

Hi there! I need a picture made into watercolor effect, and ideally I would like to remove a couple of bits from the picture. I also like to scale the watercolor picture in fitting in an envelope liner size. Below is the original picture to be transformed into wartercolor, AI app for the effect is fine, and an example of the envelope liner size and shape. Please message for any questions or better description! Thank you!