Best "beginner" nomad cities?

Wondering which cities you would suggest for people who are new to digital nomading and learning the ropes. Thinking about the following factors:

• Generally good internet infrastructure and speeds
• Minimal need for “street smarts”–safe, not a lot of scammers
• Can get around with ease as an English speaker
• Good amount of other digital nomads
• Easy to get into/out of country
• Nomad-friendly travel policies (length of visa, etc, proof required, etc)