Freelancers cannot help you win jobs here on Upwork. We can provide suggestions and advice, but there is no definitive way to win a job for all proposals submitted. I have a few suggestions:
With six (6) years of graphic design experience, your hourly rate is too low. I know that rates vary depending on location, but the other Bangladeshi graphic designers I see with the same amount of experience are between $5/hour - $10/hour.
Also, be sure to select your Data Entry/Lead Generation profile when submitting proposals for lead generation work.
Finally, you should add more examples to your portfolio. Clients will expect to see more examples of a graphic designer's work.
