In this site, ledger start refers to the initial process of setting up and using a hardware wallet — from unboxing to sending your first transaction.
Write it on paper and consider metal backup. Never store it on cloud, photos, or text files. Make at least two physical copies stored separately.
Yes — with the recovery phrase (seed). Anyone with that phrase can access funds, so keep it safe.
Only use well-known, reputable apps and double-check addresses on your device. For unfamiliar apps, research reviews and community feedback first.