Can I opt out quickly so I can see how the difficult things work? -> Yes, you can just turn off "Simple Mode": https://share.cleanshot.com/JmkgmflH

Will I get this flow every time I change computers, delete cookies, etc? -> No, settings are saved per user in the database. So it is synched across all devices and you won't have that problem.

How much will it bloat the experience once I'm an expert? -> Depends on the SaaS but ideally once you're an expert you just see all available features (as you normally would).