Visa multiple applications

I would like to work part time in Hong Kong for a 1 year period minimum as a freelance industrial designer. Is it possible to apply for multiple visas at the same time? For example the Working Holiday visa and also the QMAS? I understand the QMAS may have long processing times hence I want to cover my options. Additionally can you advise how long I have to enter and activate my visa if the QMAS visa is approved? Thank you