When taking your driving test it needs to be a balance between caution and risk. You need to show confidence, but also control. Being too cautious holds others up, it causes hesitancy and a repeated fault is not good. It could result in a fail. The opposite side of it is overconfident - taking risks that could ve deemed as dangerous, causing other drivers to react. When pulling out - have the car prepared, give yourself time to observe and judge the decision around a real situation - would I make it if I was walking? It's safe, controlled and not too risky.
Learn 2 Drive With Simon www.learn2drivewithsimon.co.uk