Just be prepare a plan B if you don't get the WHV.
"he/she is able to produce financial proof of having an amount (Note 4, Annex) sufficient for his/her maintenance during his/her proposed stay in the HKSAR, e.g. bank statement, saving accounts passbooks, etc.;
he/she holds a return air ticket or financial proof of having sufficient funds to purchase a return air ticket; and
he/she agrees to hold medical, healthcare (including hospitalisation), repatriation and liability insurance to remain in force throughout his/her stay in the HKSAR (Note 5, Annex)."