Go to Settings > Reading in your WordPress dashboard. In the Front Page Displays section select the static page option. You’ll see two dropdowns one for the Front Page and an other for the Posts Page. Choose the page you want for your homepage. You can also set your blog page by selecting the page you want in the Posts page dropdown, but you should do that with page templates instead, it gives you more options. Finally click on the Save Changes button at the bottom of the page.