"Compared to someone who started learning the piano when they were young, I ~"
- "Compared to someone who started learning the piano when they were young, I ~"
"compared to ~" 「〜と比べる」
"learning the piano" 「ピアノを習う」
"someone who started learning the piano when they were young" 「小さい頃からピアノを習っていた人」
「小さい頃からピアノを始めた人と比べると、私は習うことがたくさんあり大変です」"Compared to someone who started the piano when they were young, I have a lot to learn."