Using Link Tree Bio -> zapier webhook (make Java =Zapier child key )->HTTP address connect goal

Question

My name is joe My goal is Using Link Tree Bio

https://kenclarkefitness.app/

This address connect

This my goal

First of all Select from the Zapier webbook catch hook option Paste the Zapier URL and Test trigger successfully executed

1. The problem is the setting of the child key Before that, I used Mailchimp api key Just because there's a security vulnerability, I want to know how to make a child key Or I'm asking if you know the site that can be made

2. https://kenclarkefitness.app/ Which app should I use to connect this address? I send the coach and mail address of that address I'm trying to connect through Slack, is it okay?

Ps. I started playing Zapier last week. I'm not familiar with the terms, and I've never done an automated system like this before, so I don't know I'm learning from the beginning Especially, it's not that I can't zapier with my iPhone, but I can't see a lot of the text in the setting option field and it's hard to choose If there's anything I don't know, I'll ask I look forward to your kind cooperation.