The question is what type of website.
I will be honest, various types of websites require various levels of work, and sometimes multiple workers.
Probably the easiest website to do on your own is a blogging website. Content websites are a good model, but you have to know how to target and build up an audience. Which can take time, some of the more popular content sites took years to build thier respective audiences. Being a fantastic writer doesn't hurt either.
But when you start to talk about e-commerce or software as a service websites you begin to get into territory where it requires some level of technical expertise involved and months of hard work. Knowing how to do programming on the back end and design and user experience front end begins to increase in importance. It also often something that may not be good to do on your own.
Honestly, if you want to take on a tech project on your own, a phone app may be a better idea. Web development can be lengthy and complex. You have to have a solid idea.
I am not saying this to discourage you, just to say "I want to do a website" is a bit more involved than it looks. People assume it is simple, when in fact it is quite complicated.
So the question is do you know HTML/CSS, Javascript, Databases (SQL/noSQL), a Programming Language (C#, Java, Ruby, Python, C++, etc), UX principles, etc.
My advice is if you wish to do this is to find your local tech resources and learn from people who have done this.