Proton currently fails to guide you as a new user. I've introduced some people into my Visionary plan recently and realized that there's very little comprehensive guidance of switching into the ecosystem. This should be a defined workflow from Proton if they want to market themselves as an ecosystem.

Here's how you import, sort your emails and set up filters.
Here's how you import passwords, set up aliases, 2FA and migrate to Proton, while keeping backups so you don't lose data.
Here's how you can switch to Proton Drive, set things up and here are our suggested workflows.
This should be a flow that STARTS immediately.