Costomize

“customize”
podz has written a bunch of very helpful WordPress guides.
https://www.tamba2.org.uk/wordpress/
You’ll probably want to head for the CSS guide, but basically everything is good.
There’s a lot of good templates out there as well, so perhaps you don’t want to worry about tweaking too much and would rather write.
https://www.ads-software.com/support/5/16803
Good luck,
Bryan
(keywords: customize CSS template layout link colors)