Some advice....
Retail is a good start, learn the industry a little bit... then..
Go to school! Period.
Take a business admin. diploma or one similair. Something that covers a few different areas of biz.. marketing, accounting, etc..
There are very few that make a living only on fishing in Canada. And the ones who do, are great at the above mentioned areas of business and have put their time in(years on years) to get where they are now. i.e. hosting a show.. well, thats the easy part. That is the tip of the iceberg of what goes on behind the scenes.
As for fishing, any free time.. get out. Time on the water or bank is priceless.
Anythig else, ask away, been there.. dun it in this industry(except for being a lodge guide).