Hello Saiqua,
I saw your resume, I know WordPress is new for you,we are glad to help you
I had once such problems you have now,you should learn more to overcome problems or you will lost all you create before,
For wordpress site you can use a plugin to backup the site(all content with images and database)you can create a backup in less than 2 minutes,and it is easy to restore a backup( we use such plugins to migrate from a host to another) .one of the best is Duplicator,which has a free version in www.remarpro.com,if you use this plugin you won’t lost you data anytime.
2-you are 2 ways to use style in your theme
first-you can add a style to a css file ,this way is wrong
second -you should enqueue your style in functions.php (In this way your style load in right way and you will not face problem.
in codex.www.remarpro.com you can find many things about enqueue in functions.php
when you have more than one CSS file(like ie.css,main.css,style.css,..)
you should enqueue your styles
Enqueueing Styles and Scripts #
Scripts and styles should each be enqueued with their own function, and then those should be wrapped in an action.
WordPress won’t automatically load the stylesheet for your child theme on the front-end. Below is an example of using the wp_enqueue_scripts() action hook to call a function that enqueues the child theme’s stylesheet.
<?php
add_action( 'wp_enqueue_scripts', 'my_plugin_add_stylesheet' );
function my_plugin_add_stylesheet() {
wp_enqueue_style( 'my-style', get_stylesheet_directory_uri() . '/style.css', false, '1.0', 'all' );
}
Best Regards
Rohallah