1. Log in WordPress dashboard.
2. On the Dashboard menu, go to Appearance and click on Themes.
3. Now, click on Add New.
4. You can search for a theme by utilizing the search bar or browse through the available themes under Featured, Popular, and Latest categories.
5. Now, hover your mouse over the theme you like and choose Install.
6. As a last step, click Activate on your newly installed WordPress theme.