Other forms: hesitances
If you feel reluctant to act or tentative about speaking, that's hesitance. Your hesitance to answer or ask questions might mean you never raise your hand in class.
Not being sure what to do, or simply moving slowly in your actions, is hesitance. Nervousness or lack of self-confidence can result in someone's hesitance, but so can caution or even a justified aversion to something: "She felt some hesitance about getting involved with their shenanigans." Hesitance and hesitation share a Latin source, haesitare, "to stammer."