Hi Terri
Welcome to Microsoft Community.
I realize that you've encountered a problem with " Error code 30103-13 ", and I understand how you feel. Don't worry, I'll do my best to help you.
Regarding error code 30103-13, Microsoft has a dedicated solution support article. You can try to troubleshoot by following the steps described in it. It can solve the problem that you cannot open Office. The article link is as follows:
Error code 30102-11, 30102-13, 30103-11, or 30103-13 when installing Office - Microsoft Support
I hope these suggestions have been helpful to you!
Feel free to let me know if you have any other questions or need any further help.
Best regards
Adrian.C-MSFT | Microsoft Community Support Specialist