2. Summer is a good time to explore music history. A good introduction for classical piano students is found on Audible.ca https://www.thegreatcourses.com/courses/the-23-greatest-solo-piano-works.html check www.audible.com I found it there for a really fair price.
3. YouTube score watching; paying attention to one element at a time: articulations , dynamics, tempo
4. General piano skills
- Sight reading