You will need to change your WordPress settings after creating the static homepage.
To do that, simply go to Settings » Reading in the WordPress dashboard.
Here, scroll to 'Your homepage settings' and select 'A static page.'
You can now open the 'Homepage' dropdown and choose the page that you want to use as the new homepage.
Then, simply scroll to the bottom of the screen and click on 'Save Changes.' You can now visit your site to see the new custom homepage live.
If you have a blog, then make sure to create a separate blog page to display your posts. Otherwise, visitors will struggle to find your latest blogs.