A good question.
A local answer.

Read the rental agreement and the separate insurance policy as two documents; note who pays a claim first and what can be reimbursed.

If you can comfortably handle the bags, a bus to Southern Cross may be straightforward; check its stop and operating hours.

Keep an indoor option for July weather and a slower arrival day if you are recovering from a long flight.

For a coastal or evening outing, take a warmer layer than you expect to need in a sheltered daytime street.

Plan the stadium entrance and transport after the final whistle, particularly for a night game.

Choose the hotel whose neighbourhood fits your evenings, and keep a refundable rate while the rest of the trip takes shape.

Read recent reviews for comfort and the operator's weather and cancellation policy before booking.

Follow the river promenade for a simple first walk, choosing a turnaround point that leaves time for dinner.

Decide whether you want a quick market tasting or a seated lunch, then leave room for both browsing and eating.

Check pram access and family facilities for booked attractions, then leave a flexible indoor option for bad weather.

Choose St Kilda if a waterfront walk matters more, and plan around the weather and any market schedule.

Ask for the room capacity, layout, screen, Wi-Fi and any minimum catering spend before comparing rates.