Follow these quick steps to start getting scans:

Published dynamic scan links stay available when your plan changes. You can pause a code yourself, and content can be restricted for abuse. Static codes keep working as long as their encoded destination remains available.
There is no paid checkout during the pilot. Your published scan links stay available when plans change. New creation, uploads and paid edits may be subject to the limits of your future plan.
Your workspace includes 10 published dynamic QR codes, 200 MB of storage, files up to 10 MB, 90-day analytics and one owner. Static browser generation has no account quota.
Yes. With a dynamic QR, update the content and publish the changes. The printed code keeps the same scan link. A static QR contains its destination directly, so a content change needs a new code.