We have a dedicated tutorial video for membership plan creation with the stripe gateway which you can see from below URL
https://www.youtube.com/watch?v=-KEtlrExZcc&list=PLUT1MYLrVpA-XvgbctgajnKWW1fFPAD0A&index=2
To create a stripe plan you need to login to stripe dashboard first. Then navigate to Billing->Product
and add a new product
This you will be redirected to the page with below info
Fill the pointed field and then add pricing plan button. After clicking the button you may prompt to add you password. Please provide your password and it will redirect you to a page with below info
Now click the pointed area and then you will be redirected to a new page with plan id and more details
Copy this plan id and paste it the the wordpress Add member plan Plan builder section Stripe/Braintree Plan Id. Check the below image.
