Setup paypal subscriptions

Hey guys,
I’m trying to add PayPal subscription system to my app, but just can’t make it work.
I bought Zeroqode’s plugin (Paypal Recurring Payments & Elements | Plugin for Bubble by Zeroqode) but can’t find any documentation for using it.

I’m looking for some guidance, maybe some article or 1 on 1 session with an expert for making it work, do you have any recommendation for one? Thanks!

BTW - I can’t use Stripe due to my business location