Welcome to Upwork, Saranya! I would suggest that you start by reading up on the resources we have compiled here. Hopefully, the tips on the threads, blog posts, and articles will help you get started on Upwork. Pay attention to the Safety First! section, and these tips for avoiding questionable jobs, as these will help you work safely on Upwork.
Afterwards, if you have any questions feel free to follow up in the Community and we'll gladly help you with them.