Hi Bineeta,
Well done on landing your first contract so quickly. Considering you only joined in June, this is a great achievement as some freelancers take a lot longer to find their first role.
I would say that you need to create a more extensive portfolio. Do you have any more pieces of original work that you could upload to your page?
You need to elaborate more about your employment history. Which duties did you carry? The client would need to know more about your capabilities, as you only have 1 completed contract at the moment.
Take some more tests that are relevant to your skill set. If you achieve a low score, keep re-taking the test until you achieve something better.
Finally, be consistent with sending applications. You need a lot of patience with freelancing.
All the best.