Making an App in frappe framework

i am making an web app in which there is login with mobile number after that i am doing the registration of the user and after that i am making 3 package to the user gold silver and bronze . The user will buy them . I am beginer in frappe just completed the traning . Give me the aprroch how the work will begin. I have to make the web pages or web forms . I was making the webforms but in last there is showing thanks for submmiited you will redirected to site with in 5 sec . i donot want these things . Kindly give me the way how to do this .

Web Form Documentation
https://frappeframework.com/docs/user/en/web-form

Documentation for Customizing Web Form
https://frappeframework.com/docs/user/en/guides/portal-development/web-forms

You can configure the Success Title, Success Message, etc., from Customization.