Welcome! Survivor gives you a solid start.
Kei's advice on life and roleplaying!
1, Have a think of the type of character you wish to write, motivations and background to give yourself something to start off.
This can be from movies, books, from your own experiences in life, situations, individuals, or things you've always wanted to try out.
As you've got a survivor, what's he surviving from (predator|bandits|wildlife|hardships), what has he learned or behaviors he's taken on to get by.
2, Have a read of the getting started guide.
http://starwarsrp.net/topic/259-guide-getting-started-rules/
3, Ask any questions you have here, alternatively you can pm me if you get stuck, but don't worry, no question is too simple to start.
4, Browse the faction directory, being aware each is very different in intent, activity and membership, and that you are not limited to one (in almost all cases)
http://starwarsrp.net/groups/
5) If you are still stuck on the character specifics have a browse of wookieepedia for ideas or inspiration.
http://starwars.wikia.com/wiki/Main_Page- Which has extensive resources
6) If you want me to plug a planet that was badly destroyed, well you have plenty here from the constant wars such as corellia which was split in two or tython which was sith-decorated.
An asteroid impact that hit this one,
Kaeshana - IC:
Backdrop (Along with a lot of other threads!)
Hopefully that helps! Enjoy your time here.