best way to build a website?

It completely depends on your needs. It's like asking "how do you exercise?" - is it for endurance, muscle, weight loss, do you have a time frame?

If you're looking to get something up and running fast, definitely use something like WordPress where all of the hard work and back-end stuff is done for you. If you have a lot of time and would like to customize each and every detail, learn the basics. Start with HTML and CSS, then slowly work into learning JavaScript, then backend stuff like PHP and SQL. If you learn those, you can basically make anything you want.