If you are so worried on "messing something up" - then it is clear that you do not have enough expertise to operate a rooted phone. I don't mean it negatively... It's just for what it's worth, I have seen so many people root their phones and end up with a bricked phone (because the take root failed), malware because the infection was able to take root access easily, or general errors on the device because the user does not know how to solve them.
When you root an Android, it gives you full control over several things, which many people do not know how to manage properly. This is why the root is in place to be operated by Android System to help ensure you don't ensnare your device accidentally. It is better safe than sorry when it comes to taking root. If you brick your phone, you will have to start over... Too risky in my opinion.