Most laptop hdmi ports are output not input. They are designed to connect a laptop to a monitor.
There are a few that have hdmi input.
You could use VNC Viewer on your laptop to view the Pi screen (by enabling VNC in Pi Configuration) over wifi/network.
You need a HDMI cable with a micro HDMI male connector on one side. There are also cables available with mini connector but that will not fit. For example you can use one of these hdmi micro to hdmi cables.
As corrected by some comments I was wrong with a Pi Zero. This model uses a mini HDMI connector as shown at https://www.amazon.co.uk/AmazonBasics-...
You should find a friend who is more knowledgeable than you wrt computer technology - or perhaps consider hiring someone to help you. Randomly connecting physical ports between computers may destroy your hardware.
The steps are not difficult, but you should read before proceeding.
Download the OS image you need & flash it to your SD card. Read ...
See if you can set the default audio sink device in Pulse Audio Volume Control settings, as described in this answer. Pulse settings are user-specific, so this has to be done for every user you create.