I second Kris' and Alice's and others advice. Keep on singing and talk to your teacher, frankly. But I would add an observation: IF you are so soon trying Italian classical songs of any century, then EITHER your teacher pays very poor attention to you, OR you don't sound as any strangled cat, and your voice and hearing sense do have real possibilities to make a decent, or a good singer of you.

Don't tape your songs or exercises a capella: you will be rapidly disappointed. Tape your lessons with piano, then compare succesive lessons and hear the difference. And don't give up.

Un abrazo,
Andrés (the amateur singer who studied 4 years and could sing Mozart and folk, Wagner and spirituals, Verdi and canzonetta)