The things you mentioned are very good, but what I’m missing is feedback and a good foundation.

Feedback should come from other developers - ideally experienced, but a good dialogue between beginners can also teach both sides a lot. For me this came only after I started working, through code reviews. But you could also try contributing to open source, or putting your own code online. Although I fear you won’t get much feedback.

A good foundation is about software and hardware designs. Without this you will inevitably come to a point where you made a fundamental mistake in design.

For hardware design I recommend YouTube. Many channels talk about low level hardware. You don’t need to become an expert, just get a high level understanding.

For software design, check out the gang of four’s Design Patterns. It is a seminal work. You don’t need to read it all but be aware of the patterns, and study a few like factories and facade in detail.