Method 1: "Lost your password?" Link
The easiest way. Click the link on the wp-login.php page, enter your username or email, and check your inbox.
Method 2: Through Softaculous
If you installed WP via Softaculous in cPanel, you can reset the admin password there without needing email access.
Method 3: Via PHPMyAdmin
Advanced: You can directly edit the user_pass field in the wp_users table in your database. Remember to use MD5 hashing.