Do I want to know that is there any ready Extension available to integrate constant contact with Magento 2 platform?
If there is no ready solution available then what should be the steps to integrate it myself?
Please let me know if have any suggestions.
Thank you for reaching out to the Community! You can find our available integrations here. If there is not an available integration for your platform, I would suggest exporting your contacts into an Excel file and uploading the file into your account.
In the meantime, if you have any further questions please feel free to reach out to us here. We are always happy to assist you in any way we can!