I guess the key would be, belief, hope, positivity. To balance it out.
Like 2good said, exposure to realities and the understanding of it leads to the cynicism, and it won't necessarily leave like that -- and it has its uses. But you need to balance it out with positive knowledge. The knowledge to know that things are attainable and achievable.
Had a mentor who was saying like come up with a dream to achieve with music, one that's impossible or unachievable/unrealistic. One was "perform a gig on the moon", but even that, not necessarily unattainable; commercial space travel is becoming a thing, so the concept of a gig performed on the moon is not too farfetch'd an idea for the near future. So just think how more possible your otherwise 'normal' dream/goals are.
That's just one way at leats and it's great to see you wanting to grow and improve still!