Absolutely new to this…

I think that modifying an existing theme is by far the easiest method. See if you can find themes similar to theirs (or ask for permission to modify the one they use), open the .css file (using an editor like https://www.flos-freeware.ch/notepad2.html), and make a small change. Upload the new file to your server. Refresh and see what it changed. If it goes wrong, undo and try something different. Repeat.
There’s a CSS reference here: https://www.w3schools.com/css/

If you want to change the behaviour of wordpress, learn a little PHP (there’s an introduction here: https://www.w3schools.com/php/), look at WP’s template tags ( https://codex.www.ads-software.com/Stepping_Into_Template_Tags).

Good luck ??

Check out the WP Theme Viewer:

https://themes.wordpress.net/

Lots of very cool themes there, many are very easy to modify if you know a bit of basic html/php or are willing to learn.

Another good place to start with:
https://codex.www.ads-software.com/Theme_Development

Thank you sooo much to everyone. I’m going to be sitting here reading up on a lot of things for the next few hours.

One more question though: I read the WordPress page about creating “Pages” (that is when you put your blog into your site right?) and I don’t understand it at all… is there somewhere else that explains it better??

To create a page instead of a post, you log into WP as usual, and under the “Write” tab you choose “Page” instead of “Post.” The page will automatically list itself wherever the code calling for pages is listed – sidebar, nav bar, etc.

creating “Pages” (that is when you put your blog into your site right?)

No, total misunderstanding, sorry.
see: https://codex.www.ads-software.com/Pages

So if I wanted just one section of my site to be a “news” type of blog, that’s not a “Page”?
Example of what I would like
https://www.mikaeltellqvist.com (but they aren’t using WP)

Thank you very much guys

Those news blurbs are posts.

https://www.mikaeltellqvist.com/profile.htm <–That is a page.

1. I hate when people reply WITHOUT reading the offered resources.
2. You have WP installed – play with it, try to go to every admin panel and subpanel, experiment, learn.
3. In the example above there are no Pages, just posts.

https://www.mikaeltellqvist.com/profile.htm <–That is a page.

It is a page but not a Page ?? – not made with WP!

True. ??