Pretty sure your microwave will give you options to exhaust out the back or the top like you want. It will have a knock out in it that you remove and attach a flange to it, comes the oven.
This will get you into the cabinet. you then need to get a boot to attach to the flange.
Just a guess that the flange will be 4"x12" I forget, but get a boot that connects to it and goes to 6" round., read the directions, have seen some high end units that require 7" duct.
With 6", they make a flexible aluminium duct, they claim it is 8' long when you stretch it out, ends up being 6'
You can use this to go straight up through the cabinet and make a gentle bend in the attic to point it in the direction you need. I section of duct will not get you the 10'.
So will need a 6" coupling and another section of flex duct.
No special tools needed for the duct work, just depends on the siding of your house and how you will mount the wall cap.
A 6" hole saw will not help you, you can cut a square hole and wall cap will have a flange on it. That will be the tricky part sealing the flange.
In a perfect world, wall cap goes on first, aluminium siding goes over and around it.