Good news: the processing of payments through Stripe is now live!
If you use Liberapay to receive donations and you haven't connected a Stripe account, you should do that: https://liberapay.com/about/me/payment/ (If Stripe doesn't support your country you'll have to wait a little longer for the PayPal integration, sorry.)
If you use Liberapay as a donor you can open https://liberapay.com/about/me/giving/pay/ to see if you have donations awaiting payment. Or you can just wait, we'll notify you when a payment is needed.