Hi Kavita. In today's digital world, it is very easy to find work as a freelancer online. No doubt, your fear of getting duped is justified but there is a solution for it! You can put your resume online on trustworthy sites like internshalla, naukri. com, etc and send applications to companys who are offering the jobs relevant with your skills. And then, if you get selected by the company, then, you'll get the offer letter. And after completion of work, you'll get paid via bank or some other mode. 

I hope this information has helped you :)