Forum Moderators: martinibuster
But there is some other issue. Yahoo displays content ads on the geocities sites and the Adsense TOS does not allow to use Adsense ad blocks on pages where also other content ads appear.
Even if you are allowed to put AdSense on a geocities site, I wouldn't recommend it. If are are at all serious about what you are doing, get a domain name, and get it now. Saves you having to set one up later, and possibly lose traffic.
You asked, "how do I get my code into all that?" Well, you paste it on your HTML pages and upload it to your site's location. If you don't know how to do either of those things (If you already DO know, sorry, but your question implies that you don't), you need to learn basic HTML and how to FTP. Buy a couple of books on HTML and Web basics--too much info. for you to get it here.
Good luck! I started in 1996 with a one-page site that basically consisted of the links from my bookmark file and now it's an authority site in its area. Start somewhere, and keep moving.