It’s great that you’ve discovered a passion of yours and have the drive to practice regularly! You’re on the right track with that and seeking resources.
In terms of general advice, any art fundamentals you learn will apply to pixel art, so it definitely helps to learn them. That is, concepts such as gesture, structure, tone/value, perspective, color theory, the 12 principles of animation, design principles, composition, shape language, etc. There are many resources on each of these, which I’m sure some members can recommend to you if there’s anything specific you struggle with or want to learn about.
However, that advice is pretty basic and you can easily get lost without a goal. It’s also easier to give you advice if we know what your goals are. So what are your goals? What kind of art do you aspire to create? Is there a particular subject matter or style you really like, or something that really inspires you? Where do you hope to see yourself skill-wise in a few years?
If you don’t know how to answer those questions, don’t fret, but knowing what resonates with you and what you want to create will help in both the short and long term.