Hi lovely feng shui-ers

I live in a small studio apartment.

My personal best directions are: NE, NW, W and SW.

SW is a door. W is 2 windows, NW is a window & wall, so that only leaves NE for the best direction for my bed so that the crown of my head faces NE as I sleep. I have put my bed at a diagonal angle and I have a solid headboard (although it does attached perfectly to the bed) but this now leaves a triangular space behind my head as I sleep. Is this ok? Any remedies to fill the triangular space? This is the corner of spiritual growth and wisdom for me.

Secondly I wanted to place my sofa so that I faced W when I sat, (my relationship direction) as I could not put it facing NW, NE, SW. However this leaves it in the middle of the floor (as there is no space for it to go against a wall), and it also leaves me with my back to my (E) front door as I sit. Is this ok? If not some remedies please! Huge thanks :))