Hi Elizaah,
I am Sumit, an Independent Advisor and a 2-Year Windows Insider MVP here to help.
Press Windows+E key on your keyboard to Open File explorer.
Locate the CD/DVD drive and Right click it.
Choose Autoplay.
If you are presented a list of options, select Play Media using Movies app/any 3rd party player like VLC.
Let us know how that goes.