I can provide a resource where you can look for a CRM, christine46.
You can visit our QuickBooks App store to check for CRM that is already integrated with QuickBooks. One of the applications that are already supported is Method.
While I'm unable to provide the exact app for you, I recommend consulting with your accountant. They can suggest what's best for your non-profit business.
If you don't have an accountant yet, you can visit this link to find accountants: https://quickbooks.intuit.com/find-an-accountant/.
Let me know if you need anything else by commenting below. I'll be right here if you have more questions about integrating a CRM in QuickBooks.