I am getting a Aspire E 15 E5-574G-71WB . Does not have a optical drive, can one put in? what,how?

I am getting a  Aspire E 15 E5-574G-71WB . Itd oes not have a optical drive, can one be put in without voiding the warrenty, what drives do you suggest? Make /Model, and is it something that someone that is somewhat computer savvy can do?  Are there You Tube instructions?  Other instructions on how to do it?   Thanks so much in advance for your expertise!!!   IVe done it in a desktop, have replaced a laptop screen, so I'm not totally incompetent in laptops, but would love instructions on how to, if it can be done without voiding the warrenty.