Well, either method will work, Ewan. What is your URL (your website address)?
If you don't care what the link to your home page says, then just do what photoMaldives told you to do.
If you want it to say "Home", specifically, and your theme that you chose doesn't have a link that says "home" there are 2 options that I know of:
(1) Do what I said in my last post. What I meant when I said create a new menu pointing to the URL of your homepage ... if your homepage is just http://www.domain.com/home/ .... if that's okay with you. So whenever a user types in http://www.domain.com it 301 redirects to http://www.domain.com/home/, and this is fine ... and it's fine for SEO purposes.
(2) The other way is to just take whatever is currently the first menu item on your website and rename it to "home" and edit the permalink (URL) to "/home/". And then, if you'd like it to be a static page with no blog posts, do what photoMaldives said.
If you have any further questions, keep asking!