If you don't like getting too predictable with your outfits, marry a black overcoat with light blue ripped jeans. A pair of casual boots will add a different twist to an otherwise standard outfit. This getup demonstrates that in your early 20s your dressing options are far from limited.
The combo of a black overcoat and black chinos makes this a really put together look. A pair of casual boots can integrate seamlessly within plenty of ensembles. As you're transitioning from your 20s to your 30s, you probably want to start dressing like a grown man. That's when outfits like this are a solid bet.