According to your profile, you looks like open-minded person, You speak whatever you mean without bad second thoughts.

1) yiu fresh blood here, so getting many letters. Dont worry after sometimes all will settle.

2) , its better if you remove information about having your own company, as its attracts materialistic benefit looking girls and also scamerrs, although here taking care very good  this problems, checked well, but they hide very good too, so sometimes  its takes time, to find out that the person is real. 

You may say about your company later after some letters, only to person, who is really serious

2) Reply only to person whos is interesting for you. Its your right. what is yours will remain yours, what is not will go away itself.