Which emotions are normal and what's a normal level of feeling?

There is no normal to emotions or feelings, everyone will have their own emotions and feelings towards a specific thing, That is what that makes us interesting and different.

All emotions are normal! Everyone goes through them all. There is no wrong emotion. But everyone is also different in their experiences. There's no 'normal' setting.

Ok. This is a question that absolutly does not have a right answer. Some people are hypersensitive, others have a low range of emotions going on (or give e low emotional response), and both (and anything in between) is totaly fine. One thing you might find helpfull is taking a look on MBTI and cognitive functions, as well as the four temperaments. These are helpfull schematics drawn up to describe and categorize personalities, and might help you understand how and why you react and think and feel the way you do. I know this probably isn't the answer you're looking for, but there really isn't a right way to live and feel, and giving you a formula of "how-to-be-a-human" would invalidate who you are if you don't fit in that. So instead of trying to fit in, try to understand how you work, take some time for a little session of introspection, acknowledge what you might need to work on and develop the skills you feel you lack. I sincerely hope this helps. Take care.