Hi Chiharu,
Please click here to review my analysis of your serve.
The lesson recommended to study is:
1) Pinpoint vs platform stance
The drills assigned to practice are
Best,
loom.com
Loom | Free Screen & Video Recording Software
Use Loom to record quick videos of your screen and cam. Explain anything clearly and easily – and skip the meeting. An essential tool for hybrid workplaces.
Herman Krackow,
Head Coach