1- Such marriages are risky because you don’t know the person’asbackground. You don’t know their real identity and character. If you find someone that seems suitable, I recommend finding contacts in that city and inquire about that person. Try to figure who her friends are and talk to them. Without getting such an evaluation you are basically walking blindly into such a marriage.
2- Talking to her is permissible as long as Islamic guidelines are observed, such as not joking, not saying things sexual in nature, and being professional. If she is not wearing make up and in full hijab, you can see her on a video call.