It will make you stronger! No you will not get huge biceps so do not worry. Women do not produce the hormones to get big like men do so do not worry about getting huge
Decreases the risk of injury. Working and building the strength of muscles will make them more efficient so will reduce your chances of injuring that muscle
You will feel great! Endorphin are released when we weight train and its the most addictive substance on the planet
Lots of variety and fun. There are so many methods to weight training which allows you to be creative and try new things
Helps burn fat! When we weight train we increase both our BMR (body metabolic rate) and our metabolism so we burn more calories when we are resting!