re: "Can you please guide me how to go about it technically because I am new to the website and the work space."
All the information you need is already posted on the Upwork website in the Help section.
Upwork freelancer positions are not intended for individuals who need more personalized guidance than that.
John K provided you with the relevant link on the other thread where you have a related post, and if that isn't helping, you probably need to contact Customer Support.
Look at the right hand side of your Upwork page, and click at the question mark near your 'non-existent' face. You'll see 'Help and Support'. Click on it and proceed to report your problem. You'll be guided accordingly.