Looking for Day-to-Day Multidisciplinary Assistant

I'm an entrepreneur, creative, and freelancer and am looking for someone to help upwards of ten to twenty hours a week to help with various day-to-day tasks. Some of these tasks could include...

- Managing my email.
- Coordinating with clients or individuals on scheduling meetings.
- Managing calendar, sending me reminders.
- Doing various research, putting together reports, handling simple data entry. Will need to also write well.
- Making Wordpress website edits.
- Accessing my project management tool and handling tasks I put in there.
- Ability to message one-on-one in Slack.
- Will have to make calls (strong English is a plus).

Someone who's multidisciplinary, responsiveness, and detail-oriented are all massive pluses. Work could grow or shrink depending on week.