This is a hard one and there are many different answers to it—- since art is different for everyone. However i would say the first step is to explore and try multiple art styles. Once you find one that feels natural, one that you like, add your own touches to it. Then you just have to practice; keep in mind the more natural it is the less you will have to do.
The first note is a half note so it’s 1, 2 and the quarter note is 3. Then the next measure is quarter notes so 1,2,3. Then I think the last measure goes 1 2 and 3
