We have a 2016 Yamaha Viking and are wanting to change/drain the coolant in it. There doesn't seem to be any drain plugs at the bottom of the radiator. Can anyone please provide guidance on:

1) How to drain the old coolant?
2) What coolant to use to replace the old coolant?
3) How to bleed the system once the coolant is replaced?
4) Any other items that would assist in this adventure?

Note - Novice maintenance experience, but pretty good at following directions.

Thanks