well in my opinion, the only 2 soldering related things you can screw up are:

1) overheating a component by soldering for too much continuous time
2) getting solder somewhere it shouldn't be, therefore causing a short or bridge

It's very easy to make those mistakes, 2-3 seconds is enough heat to damage some components, but usually you will be lucky and it won't happen. If you use some flux the solder will flow and stick where it's supposed to with no effort!
This doesn't avoid the problem of dripping solder somewhere, or using too much and having it flow somewhere it shouldn't. Just use a very small amount of solder, and clean the tip off on a wet sponge or paper towel and you should be fine. If you make a mess, the solder sucker and desoldering braid will save you usually.

Of course, opening the thing in the first place is another problem, you can loose parts or damage it with static or damage the case or other parts while assembling / disassembling it. Or you can just knock the whole thing onto the floor if you're clumsy. Just be really careful, and try to keep a steady hand. Don't burn yourself, your house, and don't poke your eye out with the iron... lol.