WordPress comes in two flavours: WordPress.com managed hosting, and WordPress.org self-hosted.
Which WordPress plan to choose?
The WordPress.com pricing page details the WordPress.com hosting plan prices.
As of 28th November, they are:
WordPress.org needs to be hosted on custom web hosting.
A domain name typically costs $14.99 / year, and web hosting normally costs from around $8 / month.
Americans can use a web host like Blue Host.
Australians can use a web host like Insight Hosting.How to find the best WordPress web hosting