Kyūjitai form of 挿絵 (“illustration”)

to draw a circle, to make a circle-shaped movement

(art) drawing (being able to draw) characters distinctly

imperfective and stem (or continuative) forms of 描き分ける (kakiwakeru) [ichidan]

paint in

下書き: rough draft of a text / 下描き: rough sketch of a drawing

What you like to do, you will do well. To improve your skills in something, you must enjoy doing it.