I struggled figuring out where to start too. Everyone throws these huge series at you, and it's intimidating.
Forget jumping straight into something like 'The Wheel of Time' or diving into classic sci-fi with a ton of footnotes. A book that clicked for me was 'The Martian'. It's clever, the science is fun and explained through a guy just trying to survive, and there's a lot of heart to it. It's a single, self-contained story, so no commitment to a dozen sequels.
If fantasy's more your thing, 'The Hobbit' is genuinely the best gateway. It's a straightforward adventure with songs and riddles. The world-building in 'Lord of the Rings' is denser, but Bilbo's journey is way more approachable. Honestly, starting with a standalone or the first book in a completed series takes a lot of pressure off. You can always stop if it's not for you.