how can I get both open at same time and switch between the two.?
Just do it - open Outlook as an independent application - Open a browser window (Internet Explorer or Google Chrome etc) have both of these running at the same time - switch between the two by clicking on the task bar at the bottom of your screen (or by tabs on the browser window).
Send messages from one to the other.
If the two mail accounts have different mail addresses they are not connected in any way - you can have a dozen mail identities running on the same system if you wish - and all at the same time.
Given that you have junk mail to deal with on one mail account - and you will eventually have to deal with is one way or another - what is the point of over complicating your life by using a second mail account that has no junk mail in it?
You still get junk mail - you still get private mail - but you have the issue of having two places to look.
Good luck...
March 2015