selling online course

?Hello,
We are currently working on an online course and thinking of the best way of selling this online course to our customers.
We were thinking of hosting our videos on Vimeo (since our website won’t have that big sotarge possibilities). Then publish these videos on a WordPress site.
We plan on using the payment platform Mollie (because we start selling mostly in the Netherlands) but we are wondering how easy is it to implement the payment and password flow. So that once people purchase via our own website an online course they are sent to Mollie payment platform (this part is still easy via links), they pay, get a confirmation into their inbox together with a password. But as of there isn’t clear for us how the password generated by Mollie can be read by a wordPress website page with a membership login so that the people can view the videos (that are hosted at Vimeo). So people get a link once they purchase the video, they click on it, get on our WordPress page, put their unique password they got together with the link and view their video.
Do you have any experience with this?
Could you let us know what is or not possible, please?
Which tools or knowledge do we need?

Thank you so much for your help, I really appreciate it.

With kind regards,
LK