Let's begin with a fantastic article that provided me with valuable guidance on what aspects to focus on for improvement: https://www.gautamnarula.com/how-to-get-good-at-chess-fast/.
Here is an excerpt from this article: play a lot, analyze your games, and primarily study tactics. Your knowledge of openings, endgame, middlegame, etc. will come from analyzing your games and going over grandmaster games. Only study one of those specific topics if it is clear you are specifically losing because of that topic.
Chess isn't just a game. It's a kind of learning that needs planning, thinking ahead and really wanting to get better. In this guide, we'll share lots of helpful tips and tricks to make you better at chess.
But here's the cool thing: this guide isn't just for one person to talk at you. It's an invitation for every chess lover to share what they know, their stories and what they've learned. Together, we'll make a big book of knowledge that helps players no matter where they are in their chess adventure.