How much time will it take to learn guitar 100%, if I practice 2 hours daily?

Sure! You’re free to learn the guitar for whatever reason and plenty of people play for fun. Not sure what forums you're on but perhaps you need to visit some...

No. Total time is 8 hours, of that 3 - 4 hours is smoke time.

It depends on how long your chapter is. But try the pomodoro method, where you study for 25 minutes and take 5 minute break and another 5 minute study. This...

It takes up a lot of of time. If you want to do color guard, you have to commit to it. But just ask the coach or person in charge...

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It doesn't sound like it's broken. More likely is that the humidor is dry.

It depends from person to person, but in every case, you have to practice a lot to get good at something.

I would seek the advice of a doctor. Were you wearing your tailbone pad while you were playing? A lot of athletes these days don't wear a girdle while playing...

The longest will be days, with the shortest being just a few hours. It depends on when you ask.

Yes, contact lenses are designed to correct nearsighted and longsighted people. They can be worn as needed such as during college hours.