How do I create a waiting list sign up that feeds into SQL?

Hi guys,

Sorry if this question is too noob. I am using wordpress and I want to create a landing page where you can join a waiting list where the user inputs some text information, and then that information feeds into my SQL table. I already create a SQL database and table, just need something that easily captures their text info, inserts it into SQL, and redirects them to a thank you site.

Was researching plugins but am not finding anything. If you can point me in the right direction I would highly appreciate it!