What should I look for in a ladder?
With a roof line that low, I'd recommend a multi-position ladder because it can be used as either a step ladder or an extension ladder, making it useful for a lot of the projects that you'll probably be working on in the near future: getting on the roof, painting high up on the walls, getting up in the attic, etc.  If your roof line was much higher than that, I would go with a dedicated extension ladder.

Look for one that allows stabilizer bars to be attached when it's being used as an extension ladder (if you're like me, there's a temptation to reach just a little bit further to the side than you should).

Ladders come in a range of weight ratings so make sure that you get one that will work for your weight, and allow a margin for the weight of any tools and/or supplies you might be carrying.