@Micah Backwater, Thanks for posting in Q&A. To set startup page in Google chrome, you can configure "URLs to open on startup (Device)" or "URLs to open on startup (User)" in Setting Catalog profile:
Note: Non-Microsoft link just for the reference.
Hope the above information can help.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.