How can I change the current theme of my WordPress website

Step 1: Login to the wordpress admin panel.
Step 2: Click on Add New Theme.
Step 3: Select a theme of your choice.
Step 4: Click on Details & Preview to see a preview along with some important information about the theme.
Step 5: Click on Install from top of left side pane, to install it on your WordPress.
Step 6: Now, follow these steps to activate it.
Step 7: Click On Appearance.
Step 8: Click on Themes and activate the same.