Zend certified PHP/Magento developer

Pull orders via Magento2 API using oAuth

I am trying to connect our Magento2.3.4 to a platform that pulls orders into it . It asks for an OAuth token and Magento Endpoint.
I logged into my Magento admin panel when to Systems -> Integrations and clicked Add new Integration

Added the needed information and clicked save. I then took the Auth Token and added that to my order management platform and the API endpoint www.mydomain.com/rest/v1/ however I am getting an error that I am told is related to the oAuth token not being correct or the api endpoint. Of course I have my real domain name in there not mydomain.com

My question is is there anything more I need to do to ensure that an external platform can connect via API to pull orders? Do I need to have a storeview in the URL if I have multiple store views? I tried adding a storeview but that didn’t work.