There's no such thing called stupid question. All questions are good as long they're understandable & can be answered.
Whether it'll be Wix, Jimdo, Weebly, Neocities, Blogger, Wordpress, or .etc. All websites will have same function to store infos about your UTAU.
What makes them different are the site domain(If you can afford a domain, that's cooler) and the function they offer.
They'll create you a site for free, give you some basic templates to choose, or even let you create your own template.
They'll give you default functions and designs that can be 'upgraded' by coding. You can make your own custom function & design w/ coding too.
If you want to jump into that,you'll need at least the basics of HTML, CSS, some Javascript, and the default language of the site which will be inserted in HTML...like <b:section> <meta expr:content='' itemprop=''> in blogger
Or maybe you want us to pick the suitable one for you between Wix, Weebly, and Jimdo?