Thousands of miles. :)
There's a lot of good sites where you can get the basics.
One tip. While there's nothing to fear in nature there's a lot to respect.
But that respect, and the understanding of our place in the natural world, is a great takeaway from the experience. It's good to be humbled.

Often

Try it!

Have to condition your self before, to ensure you dont cetch a cramp and can keep up with the other hikers.

I just like to see hot women hiking their skirts up.