organic arrows

your organic arrow look pretty good but the thing is you tried the same position again and again. i would recommed you to try various positions.

organic form with contour lines

ellipses

your are ellipses are very bad with no perspective and patience. you clearly rushed it. your forms do not have the centre line that is the minor axis.

contour curves

same thing. you didnt draw the minor axis

texture analysis

you did good

dissection

your texture looks pretty good

form intersection and organic intersection

i dont find any mistake its good