An app builderwants to limit the amount of fields users are required to fill out...

Make the Opportunity type a required field on the initial Opportunity page layout and useautomation to fill in the type field to a record type.

Use different page layouts for Opportunity types based on the user profile.

Oncethe required fields are populated, use a sharing rule to share the new fields with the user.

Hide additional sections on the page layout and show the users how to manually expand them whenthey want to fill in the fields in the hidden sections.