I think you have to give a bit more information for us to be able to respond with some useful advice!
What degree do you have?
What industry / field are you interested in?
What experience do you have?
Do you have the right to live and work in HK?
Do you have family here who can support you or who you can stay with?
Depending on the industry, your lack of Mandarin and the ability to read and write Chinese might affect you. Don't forget, there are many overseas Chinese with fluent English / Cantonese / Mandarin and these are going to be the some of the ones you are competing against for work.
Also importantly, fresh graduate salaries are usually very low compared with many western countries. Without family support or accommodation you might struggle, especially if you are used to a 'western' lifestyle.
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