My Cloud EX2 Ultra SFTP Setup

Look I have limited experience with the WD My Cloud EX2 Ultra, I have only had mine for a few months.
I love it, but I need help.
I want to setup SFTP Access on My Cloud EX2 Ultra.
I have searched for how to do this, but all I get is info how to do this with the assumption that I know what they are talking about and how to configure it.
Granted I do know a good deal about the terms they use, but when it comes to putting them into action, that where I fall short because I have never had to do this before.
I need a VERY SIMPLE instruction sheet, explaining what and how I configure my cloud.
I have a my cloud on a LAN behind a Netgear R8000 Router.
I need to know what the HostName should be or how I should set it up. I need to know how to test the setup.
I need to know what I need to enable and how to enable the settings on the Cloud.
I need to know what I should enable on my router.
Can I get a check sheet with what I need to do to accomplish my take and an contact email to ask questions.
If this help is not available here, that’s fine.

this link is about using WD my cloud and PUTTY but may be a good start.