I got very interested in playing the violin for hours and hours a day when I was about 10 or 11. Before I practiced 30000 hours, I wish I'd known a few things.
90% of playing is about choosing what you think about.
If anyone can, you can.
Simplify and advance.
Sound and rhythm are mostly in the bow, (except that nothing will resonate if it is out of tune) or sometimes in the coordination between the left hand and the bow, usually meaning that the two have to be out of sync in the correct way.
Except when you want a fuzzy sound (and sometimes you do) the left hand has to stop the string completely stopped before the bow pulls the string.
The bow hold changes a little bit all the time.
The bow is balanced in the hand.
Use as few actions as possible. Each action makes the potential for the next action.
Listening and body perception are slow at first.
Interleaved practice and spaced practice work better than trying to “play it correctly ten times in a row!” This and other examples indicate that common sense and common knowledge might be COMPLETELY wrong!
You do need to sing to understand a melody, but you also need to hear the other voices to interpret a melody in a way that will be coherent.
Planning is practicing.