Since there are countless of tutorials online, I won't go into detail on how to create your character. Just make sure to follow the rules listed on the Rules and Guidelines page and of course, the ones in the Core Rulebook.
New to Pathfinder?
Pathfinder is a game of role-playing fantasy adventures, somewhat akin to the stuff we used to do on the playgrounds as kids, but with more structure and sophisticated stories and rules. Players take on the roles of individual characters or heroes and a work with a referee (me or Disturbed Meerkat) who plays the world around them. It's pretty cuul :3
I recommend Happy Campers character sheets, it includes a class specific sheet for every Core pathfinder class. If you're not feeling those old-school 'have-your-character-sheet-on-paper vibes', try The Only Sheet CORE. This character sheet is completely made in Excel, so no extra programs involved. Using the orginal Pathfinder character sheet is always fine.