We use Paypal as our main Payment Service Provider (PSP). Paypal is by far the largest PSP with pretty good coverage around the globe, that is why we use it. We do however understand that not everybody has a Paypal account, doesn't want to create one or can't use it. That is no problem. When the payment button appears, click it and you will be redirected to the Paypal environment.
On that first screen, there is an option "I don't have a Paypal account". It is not the default option, so look for it a bit lower on the screen. But it is there. Click that and you will enter Paypal in "guest" mode. Now you will see other payment options, including all major Creditcards. You can pay with Creditcards through Paypal, almost everywhere.
If both options fail to work for you, it might be the case that Paypal doesn't work. Check out this article.