Probably pretty easily if you're a good software engineer. I think they don't require as much technical knowledge, though I can only speak on data engineering from first hand experience. A lot of data engineers aren't very good programmers (some use little more than SQL) though there's always outliers.

Yes. These roles are more accepting for self-taught people than most software roles (not saying it's wide open). Anyone can email me (last name at gmail) if they want to chat.