Reddit reviews Effortless Mastery: Liberating the Musician Within

2 of the books which helped me a lot, both great for beginners (but also pros):

This ones focuses more on the right mindest towards learning the skills (hugely important imo): https://www.amazon.de/Music-Habits-Electronic-Production-Procrastination-ebook/dp/B00ZJG398U

And this one is more about concrete techniques: https://www.amazon.de/Making-Music-Strategies-Electronic-Producers-ebook/dp/B00WHXYZG8

And this one is what iam reading right now, it's more for experienced practicioners who want to understand how to make the step from being "solid" to "great".

It's also very much about developing a healthy mindset to learning and playing / producing. It's written by a classical music / piano guy, but most of what he says translates 1-1 to electronic music production.

https://www.amazon.de/dp/B005OUHOLY/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1

When i look at my own progress, i really feel "mindset" is the key word - in short, you need to accept your current level, and that learning takes time - but you also need to feel that your potential is only limited by the time and effort you are willing to put into your craft.

And: when you wanna learn a certain technique, try to find a youtube video about it! That can really speed things up.

I was in a similar position to you not too long ago. I was really bored of everything I played, I had this feeling of it being tiresome and the same old same old.

Two things happened. First, I reread Effortless Mastery by Kenny Werner, a fabulous book on how to improve one's relationship to music and one's instrument. Most of the examples are from jazz, but it is equally applicable to written music. Whilst you're waiting for the book to arrive in the post, check out his lectures on Youtube.

Second, I became obsessed again with Glenn Gould. Specifically, his playing of Bach. His conducting isn't too bad either. Spontaneously coming upon an obsession (be it a piece, performer or composer) will help.

Also, like /u/Giga_Punch mentioned, becoming more familiar with the piano repertoire will help. In addition to Mozart, Beethoven, Bach, Scarlatti, Chopin, Liszt, Debussy, Ravel, there's Schubert, Medtner, Rachmaninoff, Scriabin, Haydn, Brahms, Prokofiev, Shostakovich, Tchaikovsky, Grieg, Dvorak, Mendelssohn, Franck, Saint-Saens...there's an insane amount of music. Liszt alone wrote an incredible amount. I wonder sometimes how he found time to notate it all, let alone compose.

Here's a good piece to start with. Scriabin's Etude in C# Minor: https://www.youtube.com/watch?v=NSsKJIzwapA