if done badly / perhaps

not good at / bad at

unskilled, bad at, poor at, weak at, incompetent / superficial, halfhearted, half-assed, careless / smaller or lesser in degree

a mistake, a poor result, a screwup

to make a mistake, to screw up

humble

the lower part, especially downstream or downwind / someone at a disadvantage or lower relative to another person, in terms of rank or ability

downstream; the lower portion of a slope / (theater) downstage, specifically the left side of the stage as viewed from the audience

(uncommon) to lower one's hand onto something, to set one's hand onto something

(uncommon) someone of low status or rank