If you are competent, it is not that hard. See:
The batteries are quite inexpensive.
If not careful you can break something like a ribbon cable.
These batteries really can't be renewed. They age and then they die. If you're lucky you will have some warning before it becomes completely useless.
... Is that a good solution? Is there any possibility that my iPod touch can be broken?
You can go to any number of outfits that will replace your battery. I don't advocate that. If they break your Touch, you will be out of luck.
I'd try a DIY replacement as lllaass suggests. If you're careful you won't break it. If you do you will have only yourself to blame, but you'll learn something.
Message was edited by: John Galt