There are a few steps to take.
1) After uploading the .zip file, unpack it (could be called decompressing or unzipping)
2) Create a MySQL Database and user, and add the user to the database (write them down somewhere)
3) run the install, just go to the URL where the site will be, it will redirect you to the installation files.
4) Delete your install file, after the install is finished, and YOUR DONE!
If you have any questions, feel free to ask, me or someone else will be willing to help!