Looking for some feedback on a homebrew D&D campaign

As the title suggests, I'm looking for someone to look over my notes and give me some feedback on a D&D campaign I'm currently planning. Specifically, I need a fresh set of eyes to see if there are any glaring plot holes, logical leaps, or narrative contradictions that I've completely missed. This is just for my own personal table use, not for publishing.

About the game: The setting is a small island nation nestled deep within Toril's Trackless Sea. It features its own unique history, factions, pantheon, and even a few custom ancestries and sub-classes for the players to choose from. The core plot revolves around the party trying to stop a deranged evil mage who has targeted them directly. They'll have to figure out why they're doing this and track them down to stop their machinations. (Keeping details vague here just in case my future players find this thread.)

Unfortunately, I can't offer much in return except, hopefully, a bit of entertainment as you dive into the intricacies of a brand-new homebrew setting. But as the old adage goes: it doesn't hurt to ask.

Hit me up if you're interested in taking a look and I'll send you the link to my G-Docs.

And as always, thank you so much for your time.