All right, not bad at all for someone that is considered a novice
Your shift begins: Its a great start good build up but I think its sticking for too long especially when the brass is starting up, you'll need to find some other elements and variation, there no harmonic clash its just very simple and you can probably find ways to move elsewhere at some point.
Winter solstice: I immediately recognize the labs piano without even reading the comments. It does sound great indeed, but its a style, it gets very muddy easily and lose some of the brightness that might be needed, you can probalby add some reverb, the arrangement is good but repeating the melody and melody variation for that long its getting redondant, you'll also need to add some flavour and balance things up.
Also other points, uploading your track in 120khz plus is absolutely insane and not valuable to do it takes 200mb per wave for a 2 min track and does not give you that much more quality especially if you're using some MIDI. 48khz or 44.1khz is MORE than enough.