Having trouble switching to local account

So I havent had Windows 10 that long and I seem to have set this up with a Microsoft account (a specific email address combined with a password) that logs me into, well I guess, the Microsoft store?

So I just wanted to switch to a local account (cause thats all I want or need) and while I think I've done that successfully I couldnt tell you what my password is to access my local account, or if there is a password at all.

How do I go about determining what my credentials are for my local account? I ask because I have an android device (Nvidia Shield) that can no longer connect to my PC and I dont know how to go about enabling that function.

Also every time I now boot into my local account I get a pop-up that says "Microsoft Account...You need to fix your Microsoft Account for apps on your other devices to be able to launch apps and continue experiences on this device" - What the?

Microsoft have really messed this up, or maybe I have, but I'm quite confused at this point and any help would be appreciated.

Nevermind, figured it out.