Taking notes and recording the instructions is the best way of collecting all the information without any fail.
Being new in the job, it is best to talk to your supervisor and ask her to hold till the time you take pen and paper, and start noting everything down. If the conversation is taking place through electronic medium, it is also advisable to record the entire conversation for future references. In this way, you will be able to perform better and more efficiently rather than missing on some important details.
