How do I add a cart and PayPal page?

Hey all,

First off, I am fresh and new to WordPress, so this may seem like a simple question for most of you. ??

How do I add a payment option on my site? If I have a contact form made, how can I make the client able to select from A, B or C and then add that to a “cart” where they can pay with PayPal? I’m doing a meal delivery service and I have three selections, if that helps answer my question.

Any help is appreciated. Thanks so much!