Welcome to YorkieTalk and congratulations on your new addition. Would love to see pics of your precious little Sophie.
As far as house training goes, it sounds like you are off to a good start. Taking her outside the moment she wakes up, just after each meal and anytime in between that she does the "potty dance" -- without fail -- is the way to get her trained the quickest. Always remember to treat her after every potty -- find the treats that she loves best and reserve them for this single purpose for now. Use a potty phrase every time you take her out, something simple such as "Go Potty?" use excitement in your voice and say it as you are walking towards the door and as you go outside.
Being consistent is the rule.
About the ears, I have found that massage - firm strokes from the base of the ear to the tip helps me with pups that seem to be a bit lazy with their ears.