Canadian born Korean looking to immigrate to Korea. PLEASE HELP!

Hi All,

I'm finding the visa/immigration process very overwhelming right now. I was born in Canada to Korean parents. Lived here my whole life. I got married in Korea to my wife, who's a Korean citizen. I sponosored her to Canada after we got married. We've lived here in Canada for 9 years and are looking for a new advernture abroad in South Korea. She still holds her Korean passport. 

Anyways, I'm not sure if I have to apply for a visa first and then immigration or if I can apply for immigration directly from the start. If I have to apply for a visa first, which is best 1. F4 visa (Korean descendant) or F6 visa (through marriage). Also, what documentation do I need; birth certificate, Canadian citizenship, criminal background check etc. 

Also I speak Korean at about 60-65% level and we will be wiring over 100K CAD to Korea to meet some of the requirements for F6 visa. May rent initiallly or live with in laws in the beginning. 

If anyone can assist me with directions, please do so. Much appreciated!