Creating your own podcast can be complicated. For beginners, it is probably easier to sign up to a free podcasting website. These websites are pretty easy to use and they give you a decent amount of space to start off. If you want more space and bandwidth, you will have to subscribe to their service. The RSS feed is also automatically created after you create an episode and upload your content.
The one site I have used and still currently using is Podomatic - http://www.podomatic.com. Podomatic offers free service of 500 MB space and 15 GB bandwidth. If you want more, there are different packages you can purchase but the free amount of space and bandwidth is good enough to start out with.
Another site you can use is Podbean - www.podbean.com. Podbean offers free service of 100 MB space and 1 GB bandwidth and if you want more space, it is $4.95 a month for 300 MB space and unlimited bandwidth. I think Podomatic is still better but this is another option to chose from.
