You're doing great man! I'll give you my quick see.
1. KEYS: There is no key of D#, The key is Eb. As well as F#, it's Gb, And G#, it's Ab, and A#, it's Bb. This is standard music stuff! And there is such a thing as Cb, it's not often used, but it does exist.
2. POSITION MARKERS: The one's you've added help a lot! Adding them on the board would help more.
3. MELODIC MINOR: You use the reference of #, the technically should be b.
Enough for now.