Siri

Can I do it with a laptop? Do I need a desktop? Can I do it with a tablet? With specifications I mean RAM, Hard drive GB, rpm, oldest version of Intel recommended, GHz and all the things that are important for it? Also if I get a lot of visitors in the website, are all these things important or that's related to the host. Also how much memory (GB) will spend the installing of all the things required to build the website (I mean download WordPress, Cpanel and all the other things, I don't know if these are the only thing that I should download)? Once you download these things that's the only memory it will spend? The things you do in the website will be saved on internet not in the computer, right? I want a professional web hoping to receive a lot of visitors. Is important that the computer is fast for building the website? Sorry I think is obvious that I'm not an expert I'm new in this. Thanks in advance!!!