I am new to these stuff, and theres not a single guitar tech near my place, or someone i can ask. I notice two things: 1) If i play an open string with a bit of power - theres a fret buzz. 2) as you go up on the fretboard from 1 to 22 The space between the string and the fret slightly goes up What should i do? what should i adjust? The bridge or the trussrod or both? Please explain clearly.