Consider for a moment how your phone is currently being answered. Professional courtesy is quite often not the standard for many college students. An abrupt "Yeah!" could be listed among the more courteous greetings. The more outrageous remarks will often buy you a major black mark in the professionalism category—even if it was your roommate answering your phone and acting crazy. A simple "This is ____" is always a pleasant change for a college student call. Make the change today, before the next (or first) employer phone call. If you have a landline, you should also encourage your roommate to do the same.
Calling leads is an important part of growing your business, but it can get frustrating when you call and call and never get a reply. Having phone scripts in place can make all of the difference in the effectiveness of your lead calls. Scripts allow you to come across as confident and professional and convey all the important points you need to make. No more stumbling over your words or forgetting to mention an important factor, like your name or phone number. Scripts will help you stay consistent and make calling more enjoyable because you’ll know what works and what doesn’t.

Website: https://www.amazingvoice.com/blog/10-best-professional-voicemail-greetings
Don’t be too hard on yourself. Chances are, that voicemail that you’ve recorded and deleted thirty times has been just fine. Your main goal is not to get in the way of the caller leaving a message, which is exactly what can happen if you overthink it or drone on too long.