I hope you don't mind a story. If you just want to answer the question, by all means.
9th Grade was probably the most interesting time of my life. Prior to that, like most Asian kids, I was mostly forced by my parents to play the piano. I didn't dislike it, but it just wasn't a priority for me. This year was particularly important for me, as it was the year I quit piano (for good?).
I developed an unhealthy addiction for a particular video game, my mother (who had been managing my piano studies) went back to Taipei, and it was just me and my laidback father. She prepared me well for my Royal Conservatory of Music Level 9 exam, in which I memorized all the pieces beforehand and played them pretty well. I was aiming for a 90+, since that was my mark for previous exams.
By the time she got back, right after my exam, I had to break the news; I couldn't remember most of my pieces, my form was sloppy, and I played with a mechanical jitteriness. I got a 73 or so on that exam.
Did I mention I had a really passionate and great teacher? I never contacted her again after my 73, not a message, call, or a scheduled class after I told her that I got 73 through a really brief text message. I couldn't bare to see her reply, so my mom took the brunt of it.
I was still deeply involved in music; I played the trombone for the senior and orchestra at my school, I took Harmony and Counterpoint, studied for Music History, but I never graced the piano with my torn fingers again.
What hurts me the most was that during that time when I was studying for Music History, my mom bought me entire bookshelves of Chopin's nocturnes and marzuka's, Lizst's most beautiful works (those two were my favourite), talking about how I was gonna come back and get back into piano for RCM 10, but I never did. I feel like she was deeply saddened by this, and I am too.
It took the 10th grade for me to realize what a mistake I've made, but my resolve was a bit shaken and I didn't have the time to go back. I'd give up nearly everything to be able to play the piano again.
After hearing so many great pieces after that time, I sorely regret not being able to sit back on the piano and start sight reading music I truly cared for.
End of Story
Hence, this is why I want to learn piano again. My peak level was RCM 10, romantic era pieces were my favourite, but now I feel like I don't remember everything.
My right hand still remember the first few measures of Mozart's Sonatina in C that I played back in RCM 7 or something, but everything else is gone, nothing but a distance memory to me now.
How can I learn piano again, and can I even do it still?
I'm in university now. I have co-op terms every 4 months, and after work, I really want to spend all my time learning the art of something I have taken for granted so bad.
Edit: went back home for a bit, played Chopin's Noc in C# minor (my favourite as a kid) and remembered nearly everything, except for the end with the scales lol, but other than that im surprised how quickly my hand remembered the piece!