The best way to know if people like your product is they're actually pay for it. Here are some ways how you can charge your clinets. You can add them as call to action button link.
is probably the easiest way to get money. You can create a simple link with your name and the amount of money. Example:
To create such a link open PayPal.me and follow the instructions
is great payment systems for creators. You can charge your clients for single time payment products or with reccurent payments. Each product will have a special like like
With Gumroad you can withdraw money to PayPal.
To start using Gumroad please register there and add a product and a price.
Please read their official documentation about getting paid and other details.