How to Make a Website Your Homepage on Safari
Changing your homepage lets you customize the website that is displayed automatically each time you open a new browser window. Safari's default homepage is usually set to start you off with Apple.com as your homepage, but you can easily change it to whatever you want.
Open Safari and click "Edit" from the menu at the top of the screen. Then click "Preferences" to open a menu full of Safari options.
Select the "General" tab and locate the box labeled "Home Page" near the center of your screen.
Type or paste the URL of the website you would like to make your new homepage. You can also select the "Set to current page" to set the current page you're browsing as your new homepage.
Exit out of the Preferences menu and restart Safari. You should see your new homepage.