Editing the CSS file

yes you can do that by right clicking on the style.css and select an option called edit from your ftp

Cool, what is the FTP address i need to add in to connect to it? ??

you can ask your web host for the ftp details

The blog though is hosted on wordpress.com itself, not sure if that means i cant actually go into it and edit it via ftp?

then you can edit it directly in wordpress admin panel right.
or else you can copy the whole style.css and paste it in your local notepad after editing just paste the code in wordpress admin panel

Trouble is, you can actually see any of the CSS in the admin panel, so i actually need to copy it and then edit. Not sure what the correct FTP settings are to edit a blog that is hosted on wordpress.com

The blog though is hosted on wordpress.com itself

You are on the wrong support forum. You’ll need to ask at the correct forum, this is the support forum for WordPress.ORG self-hosted installations. You have a WordPress.COM blog.

https://en.forums.wordpress.com/

For an explanation of the differences:

https://en.support.wordpress.com/com-vs-org/

It’s a common misunderstanding.

Ah great, thanks Jan ??