Personal assistant

I work as a technology executive and am very short on time to perform administrative tasks. I am looking for a long-term arrangement with someone who can help by performing these administrative tasks for me.
As delegation of tasks itself requires some effort, I am not yet certain how effectively this is going to work. For this reason, I would like to establish a trial period of 2-4 weeks and at the end of this 2-4 week period we conduct a mutual review to assess whether the arrangement is working for both sides and make any necessary adjustments. This is also an opportunity for us to amicably end the arrangement should it not be working out for either side, review approaches to working, responses, billing, etc. Should we agree to proceed I would anticipate that we have a review every 1-2 months to assess the arrangement and make any necessary adjustments.
My preferred approach to working is:
– I will provide you with an email mailbox to use for this job. This mailbox should be the only mailbox used for any email communications made while performing tasks relating to this job.
– Linked to this mailbox will be a Microsoft 365 account. This account should be used for storing any documents created in relation to performing this job.
– I will document tasks either via email or Jira.
– All work should be tracked in Jira (and reflected under the appropriate status).
My preferred approach to response times are:
– New tasks should generally be commenced within 24 hours.
– I will provide timely response to clarifying questions asked.
– Tasks should be moved to review status once completed.
– I will provide timely review of tasks ahead of them being closed.
My preferred approach to billing/timekeeping is:
– Billing should be ad-hoc, based upon actual time spent.
– Billing increments should be in 15 minute blocks, for example:
– 1 minute spent on a task should be considered 15 minutes.
– 16 minutes spent on a task should be considered 30 minutes.
– Time spent should be reflected against the task in Jira.
Some examples of the types of tasks are:
– Find accommodation options at a specific location and period +/- 2 days which meet a set of criteria, across both Click to view and airbnb and provide a summary in Excel
– Contact Australian ComputerShare registry to obtain dividend payment.
– Book my car in to be serviced.