I was learning the recorder when I was in 4th grade. There I learned all the white keys of the middle octave and F#.

When it was summer break I found out on my own how to play Bb, Eb, and Ab so now I just have to learn C# and the low and high octaves of the 3 octave range in order to play any piece in any key. Right now I can only play G major-Eb Major in the flat direction and their relative minors in 1 octave which really restricts me.

I am however a very good pianist. I figured that since I learned the piano and soprano recorder which are C tuned instruments that other C tuned instruments would be best to start off with since I am very familiar with C tuning.

For me something like a Bb trumpet or an F tuned french horn would be hard, not because I can't transpose but because I would CONSTANTLY have to transpose and that is hard for a long piece like a sonata or a symphony for someone so familiar with C tuning in G and F clefs.