Navigation

Hello 🙂
For my WordPress site I want two links in the nav to go to a list of all pages with a certain tag, someblog.com/?tag=hugh-penises or w/e 😛
Will I have to hard code this in or is there a way of creating them from the WordPress admin?
Also, do I have to hardcode the home page link in?

Oh and, when I set up my permalink stuff, I’m guessing the tags thing will goto someblog.com/tag/high-penises, anyway to make it just goto someblog.com/high-penises?

I’m totally new to WordPress so please do excuse my n00bishness 🙂

Thank You =]