The true ability to learn something new and stretching yourself out of your comfort zone can be rewarding , how many times have you refused to do some certain things because you are afraid??
I will not be able to replace those that their work is to operate heavy equipments but at least knowing how to use it is now a huge confidence boost for me and it will be useful for me now and in the future..
Never allow your inner fear to stop you from achieving your goals , always try something new and you will be glad you did..