The oboe introduction was great and introduced the first motif! Would love to hear the oboe later on in the piece with that motif again! Focusing around that pentatonic scale for the majority of that beautiful middle string section, it would've been lovely for double bass or cello to kick in to provide additional harmony! The melody was beautiful but it definitely needed some harmonic context!!! At the section when the piano is introduced. The reverb from the previous key signature is still ringing and causes some dissonance which doesn't sound intentional. For this, I would recommend a slight gap, to let the reverb from the strings fade out. Or possibly introduce more instruments to provide more harmonic context. When switching keys a really useful tool is the use of a diminished chord! On a piano, you can find a diminished chord anywhere by pressing a note and holding it, counting up 3 semitones, and holding that next note. Do this 2 more times and you'll find the pattern repeats itself! This chord is perfect for modulating to different keys or a new melody as it can relate to pretty much any other tonal center. I found the piece very impressive for someone that does not play instruments and has never made music before! When I first started I always found melodies to be my weakness and you've done very well for yourself making something that sounds full of emotion. Great work! <3