Another question is the difference between University and Getting certified by the Royal Conservatory of Music. What is better? to accomplish? I tend more to go back to University as you get a real degree. What do you think?
Depends what you want to do with music. You do not need a degree to enjoy music, or study music, or even to be considered a "classical pianist." However, if you plan on making a career out of it, credentials provide much leverage, and in some cases are a requirement.
RCM credentials are considered diplomas. A Bachelors degree in music is seen to be higher than an ARCT. If you are in competition for a job with other people, the degree holders will most likely be favored over those that only hold an ARCT. There are exceptions: if you have a notable reputation as a performer, recording artist, pedagogue, researcher or author, institutions may place greater value on this experience than on academic credentials.
If you just want to teach privately or in a small music school, you could get by with an ARCT in performance or teaching. You may not be paid as much as someone with a BMus. Graduate degrees are somewhat of a mixed bag in small music schools: some are attracted to those with additional education, some are scared off by the fact that such teachers require a higher pay.
Again if all you want to do is enjoy learning piano and play music, you don't really need those diplomas or credentials. Think carefully if obtaining a degree is what you need to enjoy having music in your life.