Wix Site - Custom Payments Integration

I've a wix site and i need help with client onboarding process In the site there is a Pricing section. Requirement - when user clicks on BUY button 1. The user should be shown a form where user should be able fill basic details. 2. A api should be called on submit of this form and if api returns 200OK then only accept payment from user. 3. If payment is successful then call another POST api to save the user details that we captured above. If you've read this the description then first word of your bid should be WIXROCKS else I won't accept your bid. Acceptance Criteria- I'll test the above workflow and will pay only if it works. Else no payment. I can help with technical guidance if you feel stuck.