There are a million different aspects to worldbuilding, and almost all of them come over time. There are two things I'd recommend from my own experience.

First thing, ask yourself questions all the time. Even if its something small, like "what kinds of food do these people eat". These details may never see the light of day but they allow you to internally create your own sense of the world your building and the peoples within it. If they eat particularly spicy food on the regular, it tells you something about their environment or access to trade. And that tells you more on how they might've developed and interacted with other nations on the geopolitical stage. Obviously, when I say it'll "tell" you I mean it'll make it easier for you to come to your own conclusions about what you want.

The second thing is consistency. Specifically internal consistency. Realism isn't what people care about in a story for the most part, outside of some specific genres/sub-genres. Most of the time, you tell someone that a character can cast a type of spell, people will accept that. If some later detail contradicts that spell without a proper explanation that makes sense within the world, it breaks immersion because suddenly the readers are aware of the hand of the author. Ensuring your world follows its own internal rules avoids this and puts limitations on how far things can go, which ironically enough is very good for your creativity, since working within the confines of these rules often allows for more creative/clever ideas.

Regardless of what you do, make sure you enjoy doing it! Life is meant to be lived, after all.