Create a survey form to collect data of clients

this is my process flow:
1. my employees get customers in any way
2. When the client is identified, my employee sends him a survey for his registration (appian enters here)
2.1 using appian i need to create a survey to be completed by clients, they don't need to register (using appian portals i guess)
2.2 after registration, employees will have to approve the client and manage their information with other processes such as uploading files and more data

I am new to APPIAN, I have followed most of the courses available in appian academy but I can't find the way to do it.

If anyone can help me or contact me I would greatly appreciate it.

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