The easiest way is to turn the rod over. Not all reels are ambidextrous. If there is a similar cap on the other side of the reel, then it is likely. You have to undo the screws and split the casing, and then turn everything around. A local fishing tackle shop would do it for you free of charge.
Depends on what type of fishing your doing. Out of the two the bait caster is the more challenging to do because you control the line going out. That is good for fishing banks, logged areas, spinner bait. If you just want to cast with bobber go with open or closed reel. Hope that helps.