Stick with this one.

Good evening, nice to meet you mr. C*****o, this is S**a B****o, your new italian teacher. I would like us to decide what with you a day to meet us and start our italian lessons. Is it ok for you to start next week? I need your address please. Thank you so much and have a good night!

May you help me to correct this message? Thank you so much

Good evening, nice to meet you mr. C*****o, this is S**a B****o, your new italian teacher. I would like to discuss whichdecide with you a day for us to we should meet us and start our Italian lessons. Is it ok if we for you to start next week? I will need your address, please. Thank you so much and have a good night!

Good evening Mr C******o, this is S**a B********o, your new Italian teacher. I'm here to ask asking u about awhich day when we can meet each other to for start our Italian lessons. If it is ok withfor you, we'll might start next week. May Would you please give me your address, as well? Thank u so much, and I hopewish you to have a good night. 
S**a.

Which is better?

May you help me to correct this message? Thank you so much

Good evening, nice to meet you Mr. mr. C*****o, this is S**a B****o, your new italian teacher. I would like to pick a day where we can meet decide with you a day to meet us and start our italian lessons. Does next week work for you? Is it ok for you to start next week? If so, please send me your address. I need your address please. Thank you so much and have a good night!

Good evening Mr C******o, this is S**a B********o, your new Italian teacher. I'm writing to ask here asking u about a day when we can meet and each other for start our Italian lessons. If it is ok for you, we might start next week. May you give me your address too? Thank u so much, and I wish you to have a good night.
S**a.

Which is better?