Hi @Chromie Homie, sorry to hear that, you have faced some issues.
Our replies are inline:
– I’m having difficulty setting up a test account. When I try and login to the PayPal sandbox account, it says I’m trying to login to the same account as Admin.
>> You can’t use the same admin’s PayPal account, because PayPal needs a separate account to create a recurring profile.
Please do use another test mode account.
– Also, I tried just setting up a Vendor in the backend Admin, and it won’t create the Vendor account. How can I create a new vendor manually?
>> Generally, you can easily create new vendor account via WCMp >> Vendor >> Add New : https://prnt.sc/u6ugrc
Can you please check and let us know whether it is working on your end.