If you are beginner at WordPress then just go with provided option in control panel.Go to software>> and if there’s a softaculous option then install WordPress with that and fill the details upon it is asking you.
If you wants to know much about WordPress manulally installation or increasing of WordPress version then follow below procedure.
1.Download WordPress zip file from WordPress.org(go to download,find WordPress 4.x)
2.Upload the downloaded zip file into your public_html directory
3.Extract WordPress.zip file
4.If you wanna increase your WordPress version then select all except wp-content and wp-config-sample.php files.
5.Move back selected files to public_html.Now your WordPress version will be increased.
6.For a new installation of WordPress for a new website,select all files and move them back to public_html directory.
7.Now create a database and database-user for its access and keep credentials a side.
8.Now…browse your website URL then you’ll find WordPress installation page as shown below.
9.Select your preferred language and click on Continue button.
10.Fill the database and database user details WordPress installation process requested .(See below image to get clarity)
11.Database’s Table prefix keep same or change as your wish(default table prefix is is wp_ )
12.Keep localhost as same.Then click next and fill your site name and username.password and save them.Click submit button.
13.Now it will install and asks you to login as shown in below image.