Hit the wrong key and it borked my message. Anyhoo after obtaining your domain go to HostGaor to set it up , the Domain seller will have given you the nameservers which you have to point to your domain. HostGator may even do this step for you.
Don't make the mistake of hosting where you bought the domain, If y ou do they may under the terms of EULA own your content.
Next step is to use Fantasico to install Word Press.Translation you can learn to upload or FTP(File Transfer Protocol) later as HostGator gives you a back end called cpanel which includes the above mentioned as well as many other goodies
Use Google to locate a inexpensive domain. You have to decide the name and don't make the mistake of having your domain and hosting with the same provider as if you do they may own your content.
Any step you don't feel comfortable with can be outsourced, even any content needed for the site. Hope this helps and feel free to ask questions
There is even a coupon available for HostGator which gives you the first month for a penny. Check SSWT for the coupon(hoping it is still available). Do note that HostGator also offers to transfer sites at no cost, which should ease any concerns about how one gets anything you want on the new site