How can I solve all the problems in my life?

You should just stop worrying so much. Take some time to just relax and not complain so much. All of "your problems" are really NOT your problems, you can't control the fact that your parents fight or your grandpa smokes or you have a weird clmate. There's really NOTHING you can do about any of those problems, and you should just take a moment to try to improve your situation and find out what you can do better, instead of trying to change everyone else. After that, your problems will slowly go away because they really aren't your problems, they're your family and clmates and friends problems.