In building a good website you have start with web hosting reviews and check for hosting coupons to get a discount.
Install new Theme in Wordpress - For Developers
If you are developer you can also upload new themes with this method, this way you can also have backup of theme on your system and you can make further changes in theme. Remember for this method you would require FTP of your host cpanel.
Install new Theme in Wordpress
Learn how you can install new wordpress theme on your site/blog and how you can manage it perfectly. It is recommended that if you are just a designer you should install new theme with this process not with FTP method.
How to insert Page in Wordpress
Wordpress sites are very easy to manage and you can add or remove pages yourself. You can learn how to make a page and link it with your menu items so that your users can also see that page.