Second... if you are starting and have doubts... no reason to wait to start posting... we are here to help each other and learn... don't be shy...ask, ask, ask.
Third... I don't get pretty clear your fret zero question... but I guess Is open strings (played without fretting) ooooorr, means in the tab a "don't play this string" mark...
Any way wellcome and hope to se ya round more.
Rock on bro
Power corrupts. Absolute power is kinda neat.