So, beginner-friendly and starting with 'E'? My mind actually goes to 'Ender's Game'. I know it's sci-fi, which might feel intimidating, but the prose is incredibly clean and direct. Card doesn't waste words, and the core story about a child in a brutal battle school is just so immediate and engaging. It's a 'simple' read in terms of sentence structure, but the ideas it wrestles with are huge, which is a great combo for someone finding their feet. It was one of the first novels I finished in one sitting.
For something completely different, 'Emma' by Jane Austen. Hear me out. Yes, it's a classic, but it's also a comedy of manners about a well-meaning but clueless matchmaker. The language takes a minute to adjust to, but the character work is so sharp and funny. Starting with 'E' books meant I almost passed it by, thinking classics were too hard, but a modern annotated edition or even listening to the audiobook made it click. It taught me that 'beginner' doesn't always have to mean contemporary or simple plots.