By creating a website, you are creating an online presence. This allows you to connect with people that you might not otherwise be able to reach. Whether you’re making a basic website with contact information for your small business or medical practice, creating a landing page for your freelance work, a multi-page experience for your wedding photography business or you just want a place to blog about your thoughts on food, having a website will give you a dynamic advantage.
As far as actually doing the nuts and bolts building and design of your site, you also have plenty of options. You can hire someone to design and code a website, or you can try your own hand (if you're a novice, The Best Courses for Learning How to Build Websites is an excellent starting point). You can use an online service to create web pages, or build it offline using a desktop software tool. Or, if you're a coding dynamo, use a plain text editor to create a site from scratch. How you mix and match these decisions depends on your skills, time, budget, and gumption.
After you choose a website builder and a theme, take some time to learn how to use and customize these tools. Once you feel comfortable, start making changes. Some easy changes to start with are to add your name, logo, and contact details. Then, change the text font and color, add image galleries, background pictures, banners, and other site enhancements.