The problem is that if I try for temporary marriage the Shia community is small here, and the People of the book who would agree to it are usually not chaste women. Also, I feel that there is nobody I can trust to help me in this task. Also, I don't think my parents are in favor of temporary marriage and may not allow me.

Permanent marriage is best option ask your parents they will help you. You may find in another city or country.