Re: Use magic: Make sure the wand you're trying to use is in a shoulder or belt slot.
If you're using them from inside your pack, it adds extra time to the action, as you're having to remove it from the pack then use it. This applies to everything, by the by, though force backpacks lessen the time malus. If you're really insistent about swapping weapons or using stuff from your pack often, consider the quick draw and faster than the eye feats, and keep whatever weapons you intend to swap out outside of your pack.
Re: Ranged -- if you're going to go heavy ranged, pick up point blank (defensive shot pre-req) and defensive shot (removes attacks of opportunity when you shoot in melee) as your starting feats, then take sneaky as your level three. Otherwise, disengage or flee and back off a bit (anything increasing movement speed can help here) before making more shots. Alternately, just make sure to switch out before you're in melee range, heh.
For your particular build, you could also switch in weapon finesse for either of your starting feats instead, and just ignore range. Skill wise, you seem pretty solid. You could probably dump appraise for something else, but it won't hurt terribly as is -- it's an excellent int trainer, which will help a lot of your skills. Alchemy won't help you get any potions, though. That takes a particular feat, brew potions (which takes magic), and is pretty bloody useless. Alchemy gives access to some interesting utility items, but is pretty ignorable, in my experience.
Your cha is... dangerously low. If you have any stat below 7, you're risking a stat-death via curse, which can give a -6 luck penalty to a stat. There's also some cha damaging diseases, iirc.
Anyway, s'all I got at th'mo. If you really want to run a ranged character, though, definitely try ranger. Pick up animal bond, mounted combat as your first levels, get as high a dex and wis as you can, then mounted archery as your 3rd level feat. Ride nighthunters (which fly, are fast, and hit decently hard) and just stay out of melee range.