At home drills you can work on for passing.
https://www.youtube.com/watch?v=Foj6A4WWgCg&list=PLS1ijgoGyeQjCyyy6FpBQ_xUfckHGYeDo&index=1
https://www.youtube.com/watch?v=gqhFeQ4DkYQ&list=PLm0QQqVAeQBvboGm5fWIwYVSyEwotqk1B&index=18&t=142s
https://www.youtube.com/watch?v=m-wtwOERx_Q&list=PLm0QQqVAeQBvboGm5fWIwYVSyEwotqk1B&index=1&t=410s
Overhand serving at home
https://www.youtube.com/watch?v=dScC-BAYBnI
At home strength and conditioning for volleyball
https://www.youtube.com/watch?v=3DAOzpoqyjA&list=PLS1ijgoGyeQjCyyy6FpBQ_xUfckHGYeDo&index=16
Playlist of at home drills and conditioning.
https://www.youtube.com/playlist?list=PLm0QQqVAeQBvboGm5fWIwYVSyEwotqk1B
Volleyball 10,000
https://www.coachemuptexas.com/volleyball-10000/
Stronger 10,000