Virtual Assistant for day-to-day official work

I am looking for a virtual assistant for day-to-day official work.
Job Description:
- Task Scheduling
- Attending Online Meetings
- Making Notes and converting them to Schedule tasks and points to remember
- Online Research
- Reading and Sending Emails
- Purchasing/Buying
- Maintaining Social Media Activities

Note: Should Have good knowledge of excel sheets and should pledge to maintain data privacy.

*Monthly Payment using freelancer website only.