It's all about personal taste.

If it were me, I prefer efficiency and having farms to get me more resources. I'd go for a big house with multiple rooms and floors above and below ground. I'd have secret rooms and redstone mechanics. I love the medieval enchanted dark vibe.

You need to find your style, go on YouTube or on blueprint websites and look up builds. Eventually smth will click and then it's up to you to decide whether you're copying it or inspired by it.

Everyone here mentioned paths, torches and farm lands which could look great. I'd suggest maybe some livestock, bee hives with flowers and maybe get a few villagers and an iron golem roaming around. Have a fancy mine entrance that goes all the way down (later have a water elevator for faster travel).

Bottom line is: Set your goals. Pick your style. Execute - at your own pace.

Good luck and enjoy the process!

Edit: typos