i understand wat u worried, like echo said.... the important thing to u now is time management, if u r really interested and willing to put effort... arrange urself at least 1 hour perday to practice. this is wat i got frm them as well... and now at least i can play....

about instructor... it depends actually.... i think if u are affordable... go to find instructor.... this will help u in terms of understand more in ur instrument and ur playing method.... coz if u look online or study by books without instructor... u might done something wrong and can't figure out... am i right?